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180804053 = 1671082659
BaseRepresentation
bin10101100011011…
…01100111010101
3110121012210112102
422301231213111
5332241212203
625535131445
74323544343
oct1261554725
9417183472
10180804053
1193071841
1250673b85
132b5c5b61
141a026993
1510d16888
hexac6d9d5

180804053 has 4 divisors (see below), whose sum is σ = 181886880. Its totient is φ = 179721228.

The previous prime is 180804049. The next prime is 180804103. The reversal of 180804053 is 350408081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 350408081 = 1254127941.

It is a cyclic number.

It is not a de Polignac number, because 180804053 - 22 = 180804049 is a prime.

It is a super-3 number, since 3×1808040533 (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180804353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541163 + ... + 541496.

It is an arithmetic number, because the mean of its divisors is an integer number (45471720).

Almost surely, 2180804053 is an apocalyptic number.

It is an amenable number.

180804053 is a deficient number, since it is larger than the sum of its proper divisors (1082827).

180804053 is a wasteful number, since it uses less digits than its factorization.

180804053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082826.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 180804053 is about 13446.3397621806. The cubic root of 180804053 is about 565.4610828823.

The spelling of 180804053 in words is "one hundred eighty million, eight hundred four thousand, fifty-three".

Divisors: 1 167 1082659 180804053