508917947 has 2 divisors, whose sum is σ = 508917948. Its totient is φ = 508917946.

The previous prime is 508917911. The next prime is 508917961. The reversal of 508917947 is 749719805.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 508917947 - 2¹⁴ = 508901563 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 508917895 and 508917904.

It is not a weakly prime, because it can be changed into another prime (508917977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254458973 + 254458974.

It is an arithmetic number, because the mean of its divisors is an integer number (254458974).

Almost surely, 2^508917947 is an apocalyptic number.

508917947 is a deficient number, since it is larger than the sum of its proper divisors (1).

508917947 is an equidigital number, since it uses as much as digits as its factorization.

508917947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 508917947 is about 22559.2098044236. The cubic root of 508917947 is about 798.3915322693.

The spelling of 508917947 in words is "five hundred eight million, nine hundred seventeen thousand, nine hundred forty-seven".