312172699 has 2 divisors, whose sum is σ = 312172700. Its totient is φ = 312172698.

The previous prime is 312172673. The next prime is 312172723. The reversal of 312172699 is 996271213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312172699 - 2⁵ = 312172667 is a prime.

It is not a weakly prime, because it can be changed into another prime (312172639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156086349 + 156086350.

It is an arithmetic number, because the mean of its divisors is an integer number (156086350).

Almost surely, 2^312172699 is an apocalyptic number.

312172699 is a deficient number, since it is larger than the sum of its proper divisors (1).

312172699 is an equidigital number, since it uses as much as digits as its factorization.

312172699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 312172699 is about 17668.4096341465. The cubic root of 312172699 is about 678.3674062951.

The spelling of 312172699 in words is "three hundred twelve million, one hundred seventy-two thousand, six hundred ninety-nine".