89635813 has 2 divisors, whose sum is σ = 89635814. Its totient is φ = 89635812.

The previous prime is 89635801. The next prime is 89635817. The reversal of 89635813 is 31853698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82029249 + 7606564 = 9057^2 + 2758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89635813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89635813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89635817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44817906 + 44817907.

It is an arithmetic number, because the mean of its divisors is an integer number (44817907).

Almost surely, 2^89635813 is an apocalyptic number.

It is an amenable number.

89635813 is a deficient number, since it is larger than the sum of its proper divisors (1).

89635813 is an equidigital number, since it uses as much as digits as its factorization.

89635813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 89635813 is about 9467.6191833005. The cubic root of 89635813 is about 447.5351873541.

The spelling of 89635813 in words is "eighty-nine million, six hundred thirty-five thousand, eight hundred thirteen".