89977231 has 2 divisors, whose sum is σ = 89977232. Its totient is φ = 89977230.

The previous prime is 89977207. The next prime is 89977241. The reversal of 89977231 is 13277998.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89977231 - 2²³ = 81588623 is a prime.

It is a super-2 number, since 2×89977231² = 16191804196854722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89977241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44988615 + 44988616.

It is an arithmetic number, because the mean of its divisors is an integer number (44988616).

Almost surely, 2^89977231 is an apocalyptic number.

89977231 is a deficient number, since it is larger than the sum of its proper divisors (1).

89977231 is an equidigital number, since it uses as much as digits as its factorization.

89977231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 46.

The square root of 89977231 is about 9485.6328729295. The cubic root of 89977231 is about 448.1026799481.

The spelling of 89977231 in words is "eighty-nine million, nine hundred seventy-seven thousand, two hundred thirty-one".