518397941 has 2 divisors, whose sum is σ = 518397942. Its totient is φ = 518397940.

The previous prime is 518397923. The next prime is 518397991. The reversal of 518397941 is 149793815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516652900 + 1745041 = 22730^2 + 1321^2 .

It is a cyclic number.

It is not a de Polignac number, because 518397941 - 2¹⁴ = 518381557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518397991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259198970 + 259198971.

It is an arithmetic number, because the mean of its divisors is an integer number (259198971).

Almost surely, 2^518397941 is an apocalyptic number.

It is an amenable number.

518397941 is a deficient number, since it is larger than the sum of its proper divisors (1).

518397941 is an equidigital number, since it uses as much as digits as its factorization.

518397941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 518397941 is about 22768.3539369889. The cubic root of 518397941 is about 803.3184765459.

The spelling of 518397941 in words is "five hundred eighteen million, three hundred ninety-seven thousand, nine hundred forty-one".