312003231989 has 2 divisors, whose sum is σ = 312003231990. Its totient is φ = 312003231988.

The previous prime is 312003231977. The next prime is 312003232169. The reversal of 312003231989 is 989132300213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252556502500 + 59446729489 = 502550^2 + 243817^2 .

It is a cyclic number.

It is not a de Polignac number, because 312003231989 - 2²⁰ = 312002183413 is a prime.

It is a super-2 number, since 2×312003231989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312003231959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156001615994 + 156001615995.

It is an arithmetic number, because the mean of its divisors is an integer number (156001615995).

Almost surely, 2^312003231989 is an apocalyptic number.

It is an amenable number.

312003231989 is a deficient number, since it is larger than the sum of its proper divisors (1).

312003231989 is an equidigital number, since it uses as much as digits as its factorization.

312003231989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 312003231989 in words is "three hundred twelve billion, three million, two hundred thirty-one thousand, nine hundred eighty-nine".