52691913 has 12 divisors (see below), whose sum is σ = 76623300. Its totient is φ = 34891296.

The previous prime is 52691893. The next prime is 52691941. The reversal of 52691913 is 31919625.

It can be written as a sum of positive squares in 2 ways, for example, as 29680704 + 23011209 = 5448^2 + 4797^2 .

It is a de Polignac number, because none of the positive numbers 2^k-52691913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52691953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18306 + ... + 20987.

It is an arithmetic number, because the mean of its divisors is an integer number (6385275).

Almost surely, 2^52691913 is an apocalyptic number.

It is an amenable number.

52691913 is a deficient number, since it is larger than the sum of its proper divisors (23931387).

52691913 is a wasteful number, since it uses less digits than its factorization.

52691913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39448 (or 39445 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 52691913 is about 7258.9195477013. The cubic root of 52691913 is about 374.8993223064.

The spelling of 52691913 in words is "fifty-two million, six hundred ninety-one thousand, nine hundred thirteen".