307928993 has 8 divisors (see below), whose sum is σ = 316141056. Its totient is φ = 299806000.

The previous prime is 307928947. The next prime is 307929001. The reversal of 307928993 is 399829703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307928993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (307921993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15233 + ... + 29118.

It is an arithmetic number, because the mean of its divisors is an integer number (39517632).

Almost surely, 2^307928993 is an apocalyptic number.

It is an amenable number.

307928993 is a deficient number, since it is larger than the sum of its proper divisors (8212063).

307928993 is a wasteful number, since it uses less digits than its factorization.

307928993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44535.

The product of its (nonzero) digits is 734832, while the sum is 50.

The square root of 307928993 is about 17547.9056585109. The cubic root of 307928993 is about 675.2794402212.

The spelling of 307928993 in words is "three hundred seven million, nine hundred twenty-eight thousand, nine hundred ninety-three".