98779831 has 2 divisors, whose sum is σ = 98779832. Its totient is φ = 98779830.

The previous prime is 98779823. The next prime is 98779867. The reversal of 98779831 is 13897789.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98779831 - 2³ = 98779823 is a prime.

It is a super-2 number, since 2×98779831² = 19514910024777122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98779631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49389915 + 49389916.

It is an arithmetic number, because the mean of its divisors is an integer number (49389916).

Almost surely, 2^98779831 is an apocalyptic number.

98779831 is a deficient number, since it is larger than the sum of its proper divisors (1).

98779831 is an equidigital number, since it uses as much as digits as its factorization.

98779831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 52.

The square root of 98779831 is about 9938.8043043416. The cubic root of 98779831 is about 462.2633116667.

The spelling of 98779831 in words is "ninety-eight million, seven hundred seventy-nine thousand, eight hundred thirty-one".