83717969 has 2 divisors, whose sum is σ = 83717970. Its totient is φ = 83717968.

The previous prime is 83717917. The next prime is 83717981. The reversal of 83717969 is 96971738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65399569 + 18318400 = 8087^2 + 4280^2 .

It is a cyclic number.

It is not a de Polignac number, because 83717969 - 2⁸ = 83717713 is a prime.

It is a super-2 number, since 2×83717969² = 14017396666969922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83717989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41858984 + 41858985.

It is an arithmetic number, because the mean of its divisors is an integer number (41858985).

Almost surely, 2^83717969 is an apocalyptic number.

It is an amenable number.

83717969 is a deficient number, since it is larger than the sum of its proper divisors (1).

83717969 is an equidigital number, since it uses as much as digits as its factorization.

83717969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 83717969 is about 9149.7524010216. The cubic root of 83717969 is about 437.4612214881.

The spelling of 83717969 in words is "eighty-three million, seven hundred seventeen thousand, nine hundred sixty-nine".