83797561 has 2 divisors, whose sum is σ = 83797562. Its totient is φ = 83797560.

The previous prime is 83797529. The next prime is 83797577. The reversal of 83797561 is 16579738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69622336 + 14175225 = 8344^2 + 3765^2 .

It is a cyclic number.

It is not a de Polignac number, because 83797561 - 2⁵ = 83797529 is a prime.

It is not a weakly prime, because it can be changed into another prime (83797261) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41898780 + 41898781.

It is an arithmetic number, because the mean of its divisors is an integer number (41898781).

Almost surely, 2^83797561 is an apocalyptic number.

It is an amenable number.

83797561 is a deficient number, since it is larger than the sum of its proper divisors (1).

83797561 is an equidigital number, since it uses as much as digits as its factorization.

83797561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 83797561 is about 9154.1007750625. The cubic root of 83797561 is about 437.5998113497.

The spelling of 83797561 in words is "eighty-three million, seven hundred ninety-seven thousand, five hundred sixty-one".