83900191631 has 2 divisors, whose sum is σ = 83900191632. Its totient is φ = 83900191630.

The previous prime is 83900191607. The next prime is 83900191633. The reversal of 83900191631 is 13619100938.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83900191631 - 2⁶ = 83900191567 is a prime.

It is a super-2 number, since 2×83900191631² (a number of 23 digits) contains 22 as substring.

Together with 83900191633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83900191633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41950095815 + 41950095816.

It is an arithmetic number, because the mean of its divisors is an integer number (41950095816).

Almost surely, 2^83900191631 is an apocalyptic number.

83900191631 is a deficient number, since it is larger than the sum of its proper divisors (1).

83900191631 is an equidigital number, since it uses as much as digits as its factorization.

83900191631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The spelling of 83900191631 in words is "eighty-three billion, nine hundred million, one hundred ninety-one thousand, six hundred thirty-one".