83613621 has 32 divisors (see below), whose sum is σ = 138127360. Its totient is φ = 43809984.

The previous prime is 83613617. The next prime is 83613653. The reversal of 83613621 is 12631638.

It is not a de Polignac number, because 83613621 - 2² = 83613617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83613721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43560 + ... + 45438.

It is an arithmetic number, because the mean of its divisors is an integer number (4316480).

Almost surely, 2^83613621 is an apocalyptic number.

It is an amenable number.

83613621 is a deficient number, since it is larger than the sum of its proper divisors (54513739).

83613621 is a wasteful number, since it uses less digits than its factorization.

83613621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065.

The product of its digits is 5184, while the sum is 30.

The square root of 83613621 is about 9144.0483922604. The cubic root of 83613621 is about 437.2793920159.

The spelling of 83613621 in words is "eighty-three million, six hundred thirteen thousand, six hundred twenty-one".