89435231 has 2 divisors, whose sum is σ = 89435232. Its totient is φ = 89435230.

The previous prime is 89435183. The next prime is 89435233. The reversal of 89435231 is 13253498.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89435231 - 2⁶ = 89435167 is a prime.

It is a super-2 number, since 2×89435231² = 15997321088046722, which contains 22 as substring.

Together with 89435233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 89435191 and 89435200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89435233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44717615 + 44717616.

It is an arithmetic number, because the mean of its divisors is an integer number (44717616).

Almost surely, 2^89435231 is an apocalyptic number.

89435231 is a deficient number, since it is larger than the sum of its proper divisors (1).

89435231 is an equidigital number, since it uses as much as digits as its factorization.

89435231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 89435231 is about 9457.0201966581. The cubic root of 89435231 is about 447.2011149850.

The spelling of 89435231 in words is "eighty-nine million, four hundred thirty-five thousand, two hundred thirty-one".