312172723 has 2 divisors, whose sum is σ = 312172724. Its totient is φ = 312172722.

The previous prime is 312172699. The next prime is 312172727. The reversal of 312172723 is 327271213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312172723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312172691 and 312172700.

It is not a weakly prime, because it can be changed into another prime (312172727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156086361 + 156086362.

It is an arithmetic number, because the mean of its divisors is an integer number (156086362).

Almost surely, 2^312172723 is an apocalyptic number.

312172723 is a deficient number, since it is larger than the sum of its proper divisors (1).

312172723 is an equidigital number, since it uses as much as digits as its factorization.

312172723 is an evil number, because the sum of its binary digits is even.

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

The square root of 312172723 is about 17668.4103133247. The cubic root of 312172723 is about 678.3674236795.

The spelling of 312172723 in words is "three hundred twelve million, one hundred seventy-two thousand, seven hundred twenty-three".