507391897 has 2 divisors, whose sum is σ = 507391898. Its totient is φ = 507391896.

The previous prime is 507391879. The next prime is 507391901. The reversal of 507391897 is 798193705.

Together with previous prime (507391879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340181136 + 167210761 = 18444^2 + 12931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-507391897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 507391897.

It is not a weakly prime, because it can be changed into another prime (507391597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253695948 + 253695949.

It is an arithmetic number, because the mean of its divisors is an integer number (253695949).

Almost surely, 2^507391897 is an apocalyptic number.

It is an amenable number.

507391897 is a deficient number, since it is larger than the sum of its proper divisors (1).

507391897 is an equidigital number, since it uses as much as digits as its factorization.

507391897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 507391897 is about 22525.3611957722. The cubic root of 507391897 is about 797.5927098124.

The spelling of 507391897 in words is "five hundred seven million, three hundred ninety-one thousand, eight hundred ninety-seven".