83501621 has 4 divisors (see below), whose sum is σ = 95430432. Its totient is φ = 71572812.

The previous prime is 83501617. The next prime is 83501629. The reversal of 83501621 is 12610538.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83501621 - 2² = 83501617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83501629) 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 3 ways as a sum of consecutive naturals, for example, 5964395 + ... + 5964408.

It is an arithmetic number, because the mean of its divisors is an integer number (23857608).

Almost surely, 2^83501621 is an apocalyptic number.

It is an amenable number.

83501621 is a deficient number, since it is larger than the sum of its proper divisors (11928811).

83501621 is a wasteful number, since it uses less digits than its factorization.

83501621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11928810.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 83501621 is about 9137.9221379918. The cubic root of 83501621 is about 437.0840603025.

The spelling of 83501621 in words is "eighty-three million, five hundred one thousand, six hundred twenty-one".