312723172 has 6 divisors (see below), whose sum is σ = 547265558. Its totient is φ = 156361584.

The previous prime is 312723163. The next prime is 312723179. The reversal of 312723172 is 271327213.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 301925376 + 10797796 = 17376^2 + 3286^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 312723172.

It is not an unprimeable number, because it can be changed into a prime (312723179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39090393 + ... + 39090400.

Almost surely, 2^312723172 is an apocalyptic number.

It is an amenable number.

312723172 is a deficient number, since it is larger than the sum of its proper divisors (234542386).

312723172 is a wasteful number, since it uses less digits than its factorization.

312723172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78180797 (or 78180795 counting only the distinct ones).

The product of its digits is 3528, while the sum is 28.

The square root of 312723172 is about 17683.9806604735. The cubic root of 312723172 is about 678.7659075778.

The spelling of 312723172 in words is "three hundred twelve million, seven hundred twenty-three thousand, one hundred seventy-two".