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72389099 = 367719687
BaseRepresentation
bin1000101000010…
…01000111101011
312001012202011202
410110021013223
5122012422344
611103314415
71536203636
oct424110753
9161182152
1072389099
1137953002
12202aba0b
1311cc70b3
149884c1d
15654d94e
hex45091eb

72389099 has 4 divisors (see below), whose sum is σ = 72412464. Its totient is φ = 72365736.

The previous prime is 72389087. The next prime is 72389113. The reversal of 72389099 is 99098327.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-72389099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72389059) 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, 6167 + ... + 13520.

It is an arithmetic number, because the mean of its divisors is an integer number (18103116).

Almost surely, 272389099 is an apocalyptic number.

72389099 is a deficient number, since it is larger than the sum of its proper divisors (23365).

72389099 is a wasteful number, since it uses less digits than its factorization.

72389099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23364.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 72389099 is about 8508.1783596725. The cubic root of 72389099 is about 416.7648247319.

The spelling of 72389099 in words is "seventy-two million, three hundred eighty-nine thousand, ninety-nine".

Divisors: 1 3677 19687 72389099