307385923 has 4 divisors (see below), whose sum is σ = 331031008. Its totient is φ = 283740840.

The previous prime is 307385917. The next prime is 307385951. The reversal of 307385923 is 329583703.

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 2^k-307385923 is a prime.

It is a super-2 number, since 2×307385923² = 188972211317123858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (307382923) 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, 11822523 + ... + 11822548.

It is an arithmetic number, because the mean of its divisors is an integer number (82757752).

Almost surely, 2^307385923 is an apocalyptic number.

307385923 is a deficient number, since it is larger than the sum of its proper divisors (23645085).

307385923 is a wasteful number, since it uses less digits than its factorization.

307385923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23645084.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 307385923 is about 17532.4249035893. The cubic root of 307385923 is about 674.8822276464.

The spelling of 307385923 in words is "three hundred seven million, three hundred eighty-five thousand, nine hundred twenty-three".