89878631 has 2 divisors, whose sum is σ = 89878632. Its totient is φ = 89878630.

The previous prime is 89878603. The next prime is 89878717. The reversal of 89878631 is 13687898.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 89878631 - 2⁶ = 89878567 is a prime.

It is a super-2 number, since 2×89878631² = 16156336620868322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89878631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89877631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44939315 + 44939316.

It is an arithmetic number, because the mean of its divisors is an integer number (44939316).

Almost surely, 2^89878631 is an apocalyptic number.

89878631 is a deficient number, since it is larger than the sum of its proper divisors (1).

89878631 is an equidigital number, since it uses as much as digits as its factorization.

89878631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 89878631 is about 9480.4341145329. The cubic root of 89878631 is about 447.9389382525.

It can be divided in two parts, 89878 and 631, that added together give a palindrome (90509).

The spelling of 89878631 in words is "eighty-nine million, eight hundred seventy-eight thousand, six hundred thirty-one".