83731513 has 2 divisors, whose sum is σ = 83731514. Its totient is φ = 83731512.

The previous prime is 83731457. The next prime is 83731559. The reversal of 83731513 is 31513738.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52461049 + 31270464 = 7243^2 + 5592^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83731513 is a prime.

It is not a weakly prime, because it can be changed into another prime (83731213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41865756 + 41865757.

It is an arithmetic number, because the mean of its divisors is an integer number (41865757).

Almost surely, 2^83731513 is an apocalyptic number.

It is an amenable number.

83731513 is a deficient number, since it is larger than the sum of its proper divisors (1).

83731513 is an equidigital number, since it uses as much as digits as its factorization.

83731513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 83731513 is about 9150.4925004067. The cubic root of 83731513 is about 437.4848112278.

The spelling of 83731513 in words is "eighty-three million, seven hundred thirty-one thousand, five hundred thirteen".