84198731 has 2 divisors, whose sum is σ = 84198732. Its totient is φ = 84198730.

The previous prime is 84198701. The next prime is 84198743. The reversal of 84198731 is 13789148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84198731 - 2²² = 80004427 is a prime.

It is a super-2 number, since 2×84198731² = 14178852604020722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84198701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42099365 + 42099366.

It is an arithmetic number, because the mean of its divisors is an integer number (42099366).

Almost surely, 2^84198731 is an apocalyptic number.

84198731 is a deficient number, since it is larger than the sum of its proper divisors (1).

84198731 is an equidigital number, since it uses as much as digits as its factorization.

84198731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 41.

The square root of 84198731 is about 9175.9866499467. The cubic root of 84198731 is about 438.2970174613.

The spelling of 84198731 in words is "eighty-four million, one hundred ninety-eight thousand, seven hundred thirty-one".