312661723 has 4 divisors (see below), whose sum is σ = 341085528. Its totient is φ = 284237920.

The previous prime is 312661693. The next prime is 312661733. The reversal of 312661723 is 327166213.

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-312661723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312661733) 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, 14211886 + ... + 14211907.

It is an arithmetic number, because the mean of its divisors is an integer number (85271382).

Almost surely, 2^312661723 is an apocalyptic number.

312661723 is a deficient number, since it is larger than the sum of its proper divisors (28423805).

312661723 is a wasteful number, since it uses less digits than its factorization.

312661723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28423804.

The product of its digits is 9072, while the sum is 31.

The square root of 312661723 is about 17682.2431552108. The cubic root of 312661723 is about 678.7214462968.

The spelling of 312661723 in words is "three hundred twelve million, six hundred sixty-one thousand, seven hundred twenty-three".