52690681 has 4 divisors (see below), whose sum is σ = 52791952. Its totient is φ = 52589412.

The previous prime is 52690679. The next prime is 52690697. The reversal of 52690681 is 18609625.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52690681 - 2¹ = 52690679 is a prime.

It is a super-2 number, since 2×52690681² = 5552615728487522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52690681.

It is not an unprimeable number, because it can be changed into a prime (52690601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49851 + ... + 50896.

It is an arithmetic number, because the mean of its divisors is an integer number (13197988).

Almost surely, 2^52690681 is an apocalyptic number.

It is an amenable number.

52690681 is a deficient number, since it is larger than the sum of its proper divisors (101271).

52690681 is a wasteful number, since it uses less digits than its factorization.

52690681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101270.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 52690681 is about 7258.8346860911. The cubic root of 52690681 is about 374.8964004187.

The spelling of 52690681 in words is "fifty-two million, six hundred ninety thousand, six hundred eighty-one".