89631389 has 2 divisors, whose sum is σ = 89631390. Its totient is φ = 89631388.

The previous prime is 89631349. The next prime is 89631467. The reversal of 89631389 is 98313698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87572164 + 2059225 = 9358^2 + 1435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89631389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89631319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44815694 + 44815695.

It is an arithmetic number, because the mean of its divisors is an integer number (44815695).

Almost surely, 2^89631389 is an apocalyptic number.

It is an amenable number.

89631389 is a deficient number, since it is larger than the sum of its proper divisors (1).

89631389 is an equidigital number, since it uses as much as digits as its factorization.

89631389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 89631389 is about 9467.3855419540. The cubic root of 89631389 is about 447.5278244926.

The spelling of 89631389 in words is "eighty-nine million, six hundred thirty-one thousand, three hundred eighty-nine".