84947931 has 24 divisors (see below), whose sum is σ = 127508160. Its totient is φ = 54432000.

The previous prime is 84947909. The next prime is 84947959. The reversal of 84947931 is 13974948.

It is not a de Polignac number, because 84947931 - 2⁵ = 84947899 is a prime.

It is a super-2 number, since 2×84947931² = 14432301962361522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84947971) 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 23 ways as a sum of consecutive naturals, for example, 70131 + ... + 71331.

It is an arithmetic number, because the mean of its divisors is an integer number (5312840).

Almost surely, 2^84947931 is an apocalyptic number.

84947931 is a deficient number, since it is larger than the sum of its proper divisors (42560229).

84947931 is a wasteful number, since it uses less digits than its factorization.

84947931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507 (or 1504 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 84947931 is about 9216.7201867042. The cubic root of 84947931 is about 439.5931690638.

The spelling of 84947931 in words is "eighty-four million, nine hundred forty-seven thousand, nine hundred thirty-one".