52786621 has 2 divisors, whose sum is σ = 52786622. Its totient is φ = 52786620.

The previous prime is 52786609. The next prime is 52786627. The reversal of 52786621 is 12668725.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37380996 + 15405625 = 6114^2 + 3925^2 .

It is a cyclic number.

It is not a de Polignac number, because 52786621 - 2⁹ = 52786109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52786627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26393310 + 26393311.

It is an arithmetic number, because the mean of its divisors is an integer number (26393311).

Almost surely, 2^52786621 is an apocalyptic number.

It is an amenable number.

52786621 is a deficient number, since it is larger than the sum of its proper divisors (1).

52786621 is an equidigital number, since it uses as much as digits as its factorization.

52786621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 52786621 is about 7265.4401793697. The cubic root of 52786621 is about 375.1238014944.

The spelling of 52786621 in words is "fifty-two million, seven hundred eighty-six thousand, six hundred twenty-one".