83399257 has 2 divisors, whose sum is σ = 83399258. Its totient is φ = 83399256.

The previous prime is 83399243. The next prime is 83399293. The reversal of 83399257 is 75299338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81920601 + 1478656 = 9051^2 + 1216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83399257 is a prime.

It is not a weakly prime, because it can be changed into another prime (83390257) 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, 41699628 + 41699629.

It is an arithmetic number, because the mean of its divisors is an integer number (41699629).

Almost surely, 2^83399257 is an apocalyptic number.

It is an amenable number.

83399257 is a deficient number, since it is larger than the sum of its proper divisors (1).

83399257 is an equidigital number, since it uses as much as digits as its factorization.

83399257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 83399257 is about 9132.3193658566. The cubic root of 83399257 is about 436.9053812641.

The spelling of 83399257 in words is "eighty-three million, three hundred ninety-nine thousand, two hundred fifty-seven".