83919491 has 2 divisors, whose sum is σ = 83919492. Its totient is φ = 83919490.

The previous prime is 83919467. The next prime is 83919499. The reversal of 83919491 is 19491938.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83919491 is a prime.

It is not a weakly prime, because it can be changed into another prime (83919499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41959745 + 41959746.

It is an arithmetic number, because the mean of its divisors is an integer number (41959746).

Almost surely, 2^83919491 is an apocalyptic number.

83919491 is a deficient number, since it is larger than the sum of its proper divisors (1).

83919491 is an equidigital number, since it uses as much as digits as its factorization.

83919491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 44.

The square root of 83919491 is about 9160.7582109780. The cubic root of 83919491 is about 437.8119523173.

The spelling of 83919491 in words is "eighty-three million, nine hundred nineteen thousand, four hundred ninety-one".