90180733 has 16 divisors (see below), whose sum is σ = 99221760. Its totient is φ = 81619456.

The previous prime is 90180731. The next prime is 90180743. The reversal of 90180733 is 33708109.

It is a cyclic number.

It is not a de Polignac number, because 90180733 - 2¹ = 90180731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90180695 and 90180704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90180731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46185 + ... + 48097.

It is an arithmetic number, because the mean of its divisors is an integer number (6201360).

Almost surely, 2^90180733 is an apocalyptic number.

It is an amenable number.

90180733 is a deficient number, since it is larger than the sum of its proper divisors (9041027).

90180733 is a wasteful number, since it uses less digits than its factorization.

90180733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 90180733 is about 9496.3536686457. The cubic root of 90180733 is about 448.4402510153.

The spelling of 90180733 in words is "ninety million, one hundred eighty thousand, seven hundred thirty-three".