83986205431 has 2 divisors, whose sum is σ = 83986205432. Its totient is φ = 83986205430.

The previous prime is 83986205389. The next prime is 83986205441. The reversal of 83986205431 is 13450268938.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83986205431 is a prime.

It is a super-2 number, since 2×83986205431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83986205441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41993102715 + 41993102716.

It is an arithmetic number, because the mean of its divisors is an integer number (41993102716).

Almost surely, 2^83986205431 is an apocalyptic number.

83986205431 is a deficient number, since it is larger than the sum of its proper divisors (1).

83986205431 is an equidigital number, since it uses as much as digits as its factorization.

83986205431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 83986205431 in words is "eighty-three billion, nine hundred eighty-six million, two hundred five thousand, four hundred thirty-one".