84820631 has 4 divisors (see below), whose sum is σ = 96937872. Its totient is φ = 72703392.

The previous prime is 84820627. The next prime is 84820651. The reversal of 84820631 is 13602848.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84820631 - 2² = 84820627 is a prime.

It is a super-2 number, since 2×84820631² = 14389078886476322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84820651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6058610 + ... + 6058623.

It is an arithmetic number, because the mean of its divisors is an integer number (24234468).

Almost surely, 2^84820631 is an apocalyptic number.

84820631 is a deficient number, since it is larger than the sum of its proper divisors (12117241).

84820631 is a wasteful number, since it uses less digits than its factorization.

84820631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12117240.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 84820631 is about 9209.8116701700. The cubic root of 84820631 is about 439.3734729653.

The spelling of 84820631 in words is "eighty-four million, eight hundred twenty thousand, six hundred thirty-one".