83917291 has 2 divisors, whose sum is σ = 83917292. Its totient is φ = 83917290.

The previous prime is 83917199. The next prime is 83917297. The reversal of 83917291 is 19271938.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83917291 - 2¹¹ = 83915243 is a prime.

It is a super-2 number, since 2×83917291² = 14084223457557362, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83917297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41958645 + 41958646.

It is an arithmetic number, because the mean of its divisors is an integer number (41958646).

Almost surely, 2^83917291 is an apocalyptic number.

83917291 is a deficient number, since it is larger than the sum of its proper divisors (1).

83917291 is an equidigital number, since it uses as much as digits as its factorization.

83917291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 83917291 is about 9160.6381327940. The cubic root of 83917291 is about 437.8081264492.

The spelling of 83917291 in words is "eighty-three million, nine hundred seventeen thousand, two hundred ninety-one".