508917961 has 2 divisors, whose sum is σ = 508917962. Its totient is φ = 508917960.

The previous prime is 508917947. The next prime is 508917977. The reversal of 508917961 is 169719805.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297390025 + 211527936 = 17245^2 + 14544^2 .

It is a cyclic number.

It is not a de Polignac number, because 508917961 - 2¹⁵ = 508885193 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (508917911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254458980 + 254458981.

It is an arithmetic number, because the mean of its divisors is an integer number (254458981).

Almost surely, 2^508917961 is an apocalyptic number.

It is an amenable number.

508917961 is a deficient number, since it is larger than the sum of its proper divisors (1).

508917961 is an equidigital number, since it uses as much as digits as its factorization.

508917961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 508917961 is about 22559.2101147181. The cubic root of 508917961 is about 798.3915395904.

The spelling of 508917961 in words is "five hundred eight million, nine hundred seventeen thousand, nine hundred sixty-one".