312903681 has 4 divisors (see below), whose sum is σ = 417204912. Its totient is φ = 208602452.

The previous prime is 312903659. The next prime is 312903691. The reversal of 312903681 is 186309213.

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.

It is a cyclic number.

It is not a de Polignac number, because 312903681 - 2¹⁵ = 312870913 is a prime.

It is a super-2 number, since 2×312903681² = 195817427166699522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312903611) 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, 52150611 + ... + 52150616.

It is an arithmetic number, because the mean of its divisors is an integer number (104301228).

Almost surely, 2^312903681 is an apocalyptic number.

It is an amenable number.

312903681 is a deficient number, since it is larger than the sum of its proper divisors (104301231).

312903681 is a wasteful number, since it uses less digits than its factorization.

312903681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104301230.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 312903681 is about 17689.0836676183. The cubic root of 312903681 is about 678.8964807701.

The spelling of 312903681 in words is "three hundred twelve million, nine hundred three thousand, six hundred eighty-one".