84949431 has 16 divisors (see below), whose sum is σ = 129792000. Its totient is φ = 48413088.

The previous prime is 84949427. The next prime is 84949451. The reversal of 84949431 is 13494948.

It is not a de Polignac number, because 84949431 - 2² = 84949427 is a prime.

It is a super-2 number, since 2×84949431² = 14432811654447522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84949451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2970 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (8112000).

Almost surely, 2^84949431 is an apocalyptic number.

84949431 is a deficient number, since it is larger than the sum of its proper divisors (44842569).

84949431 is a wasteful number, since it uses less digits than its factorization.

84949431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10798.

The product of its digits is 124416, while the sum is 42.

The square root of 84949431 is about 9216.8015601943. The cubic root of 84949431 is about 439.5957564758.

The spelling of 84949431 in words is "eighty-four million, nine hundred forty-nine thousand, four hundred thirty-one".