89646631 has 2 divisors, whose sum is σ = 89646632. Its totient is φ = 89646630.

The previous prime is 89646581. The next prime is 89646673. The reversal of 89646631 is 13664698.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89646631 - 2¹⁵ = 89613863 is a prime.

It is a super-2 number, since 2×89646631² = 16073036899300322, which contains 22 as substring.

It is equal to p_5197786 and since 89646631 and 5197786 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89646031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44823315 + 44823316.

It is an arithmetic number, because the mean of its divisors is an integer number (44823316).

Almost surely, 2^89646631 is an apocalyptic number.

89646631 is a deficient number, since it is larger than the sum of its proper divisors (1).

89646631 is an equidigital number, since it uses as much as digits as its factorization.

89646631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 89646631 is about 9468.1904818186. The cubic root of 89646631 is about 447.5531907270.

The spelling of 89646631 in words is "eighty-nine million, six hundred forty-six thousand, six hundred thirty-one".