89965231 has 2 divisors, whose sum is σ = 89965232. Its totient is φ = 89965230.

The previous prime is 89965223. The next prime is 89965237. The reversal of 89965231 is 13256998.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89965231 - 2³ = 89965223 is a prime.

It is a super-2 number, since 2×89965231² = 16187485577766722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89965237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44982615 + 44982616.

It is an arithmetic number, because the mean of its divisors is an integer number (44982616).

Almost surely, 2^89965231 is an apocalyptic number.

89965231 is a deficient number, since it is larger than the sum of its proper divisors (1).

89965231 is an equidigital number, since it uses as much as digits as its factorization.

89965231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 89965231 is about 9485.0003162889. Note that the first 3 decimals coincide. The cubic root of 89965231 is about 448.0827583480.

The spelling of 89965231 in words is "eighty-nine million, nine hundred sixty-five thousand, two hundred thirty-one".