31230999977 has 2 divisors, whose sum is σ = 31230999978. Its totient is φ = 31230999976.

The previous prime is 31230999929. The next prime is 31231000037. The reversal of 31230999977 is 77999903213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28989829696 + 2241170281 = 170264^2 + 47341^2 .

It is a cyclic number.

It is not a de Polignac number, because 31230999977 - 2²⁶ = 31163891113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31230999677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615499988 + 15615499989.

It is an arithmetic number, because the mean of its divisors is an integer number (15615499989).

Almost surely, 2^31230999977 is an apocalyptic number.

It is an amenable number.

31230999977 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230999977 is an equidigital number, since it uses as much as digits as its factorization.

31230999977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5786802, while the sum is 59.

The spelling of 31230999977 in words is "thirty-one billion, two hundred thirty million, nine hundred ninety-nine thousand, nine hundred seventy-seven".