83612791 has 2 divisors, whose sum is σ = 83612792. Its totient is φ = 83612790.

The previous prime is 83612743. The next prime is 83612821. The reversal of 83612791 is 19721638.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83612791 - 2¹⁵ = 83580023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83612791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83612591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41806395 + 41806396.

It is an arithmetic number, because the mean of its divisors is an integer number (41806396).

Almost surely, 2^83612791 is an apocalyptic number.

83612791 is a deficient number, since it is larger than the sum of its proper divisors (1).

83612791 is an equidigital number, since it uses as much as digits as its factorization.

83612791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 83612791 is about 9144.0030074361. The cubic root of 83612791 is about 437.2779451101.

The spelling of 83612791 in words is "eighty-three million, six hundred twelve thousand, seven hundred ninety-one".