83731457 has 2 divisors, whose sum is σ = 83731458. Its totient is φ = 83731456.

The previous prime is 83731433. The next prime is 83731513. The reversal of 83731457 is 75413738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77018176 + 6713281 = 8776^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 83731457 - 2¹⁰ = 83730433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83731457.

It is not a weakly prime, because it can be changed into another prime (83731057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41865728 + 41865729.

It is an arithmetic number, because the mean of its divisors is an integer number (41865729).

Almost surely, 2^83731457 is an apocalyptic number.

It is an amenable number.

83731457 is a deficient number, since it is larger than the sum of its proper divisors (1).

83731457 is an equidigital number, since it uses as much as digits as its factorization.

83731457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 38.

The square root of 83731457 is about 9150.4894404616. The cubic root of 83731457 is about 437.4847136972.

The spelling of 83731457 in words is "eighty-three million, seven hundred thirty-one thousand, four hundred fifty-seven".