31323416489 has 2 divisors, whose sum is σ = 31323416490. Its totient is φ = 31323416488.

The previous prime is 31323416477. The next prime is 31323416533. The reversal of 31323416489 is 98461432313.

It is an a-pointer prime, because the next prime (31323416533) can be obtained adding 31323416489 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31104613225 + 218803264 = 176365^2 + 14792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31323416489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31323416989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15661708244 + 15661708245.

It is an arithmetic number, because the mean of its divisors is an integer number (15661708245).

Almost surely, 2^31323416489 is an apocalyptic number.

It is an amenable number.

31323416489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323416489 is an equidigital number, since it uses as much as digits as its factorization.

31323416489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 44.

The spelling of 31323416489 in words is "thirty-one billion, three hundred twenty-three million, four hundred sixteen thousand, four hundred eighty-nine".