83217931 has 2 divisors, whose sum is σ = 83217932. Its totient is φ = 83217930.

The previous prime is 83217877. The next prime is 83217961. The reversal of 83217931 is 13971238.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83217931 - 2⁷ = 83217803 is a prime.

It is a super-2 number, since 2×83217931² = 13850448079841522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83217961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41608965 + 41608966.

It is an arithmetic number, because the mean of its divisors is an integer number (41608966).

Almost surely, 2^83217931 is an apocalyptic number.

83217931 is a deficient number, since it is larger than the sum of its proper divisors (1).

83217931 is an equidigital number, since it uses as much as digits as its factorization.

83217931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 83217931 is about 9122.3862557995. The cubic root of 83217931 is about 436.5885127759.

It can be divided in two parts, 83217 and 931, that added together give a palindrome (84148).

The spelling of 83217931 in words is "eighty-three million, two hundred seventeen thousand, nine hundred thirty-one".