84637641 has 32 divisors (see below), whose sum is σ = 125935488. Its totient is φ = 50135040.

The previous prime is 84637633. The next prime is 84637649. The reversal of 84637641 is 14673648.

It is an interprime number because it is at equal distance from previous prime (84637633) and next prime (84637649).

It is not a de Polignac number, because 84637641 - 2³ = 84637633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84637641.

It is not an unprimeable number, because it can be changed into a prime (84637649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 438441 + ... + 438633.

It is an arithmetic number, because the mean of its divisors is an integer number (3935484).

Almost surely, 2^84637641 is an apocalyptic number.

It is an amenable number.

84637641 is a deficient number, since it is larger than the sum of its proper divisors (41297847).

84637641 is a wasteful number, since it uses less digits than its factorization.

84637641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441.

The product of its digits is 96768, while the sum is 39.

The square root of 84637641 is about 9199.8717925849. The cubic root of 84637641 is about 439.0572808682.

The spelling of 84637641 in words is "eighty-four million, six hundred thirty-seven thousand, six hundred forty-one".