83622639 has 4 divisors (see below), whose sum is σ = 111496856. Its totient is φ = 55748424.

The previous prime is 83622619. The next prime is 83622653. The reversal of 83622639 is 93622638.

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

It is not a de Polignac number, because 83622639 - 2⁵ = 83622607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83622597 and 83622606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83622619) 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, 13937104 + ... + 13937109.

It is an arithmetic number, because the mean of its divisors is an integer number (27874214).

Almost surely, 2^83622639 is an apocalyptic number.

83622639 is a deficient number, since it is larger than the sum of its proper divisors (27874217).

83622639 is a wasteful number, since it uses less digits than its factorization.

83622639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27874216.

The product of its digits is 93312, while the sum is 39.

The square root of 83622639 is about 9144.5414865919. The cubic root of 83622639 is about 437.2951121173.

Subtracting 83622639 from its reverse (93622638), we obtain a palindrome (9999999).

The spelling of 83622639 in words is "eighty-three million, six hundred twenty-two thousand, six hundred thirty-nine".