89312813 has 2 divisors, whose sum is σ = 89312814. Its totient is φ = 89312812.

The previous prime is 89312789. The next prime is 89312851. The reversal of 89312813 is 31821398.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44983849 + 44328964 = 6707^2 + 6658^2 .

It is a cyclic number.

It is not a de Polignac number, because 89312813 - 2⁸ = 89312557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89312213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44656406 + 44656407.

It is an arithmetic number, because the mean of its divisors is an integer number (44656407).

Almost surely, 2^89312813 is an apocalyptic number.

It is an amenable number.

89312813 is a deficient number, since it is larger than the sum of its proper divisors (1).

89312813 is an equidigital number, since it uses as much as digits as its factorization.

89312813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 89312813 is about 9450.5456456228. The cubic root of 89312813 is about 446.9969804293.

The spelling of 89312813 in words is "eighty-nine million, three hundred twelve thousand, eight hundred thirteen".