52940639 has 2 divisors, whose sum is σ = 52940640. Its totient is φ = 52940638.

The previous prime is 52940621. The next prime is 52940677. The reversal of 52940639 is 93604925.

It is an a-pointer prime, because the next prime (52940677) can be obtained adding 52940639 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52940639 - 2⁸ = 52940383 is a prime.

It is a super-2 number, since 2×52940639² = 5605422515456642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52940609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26470319 + 26470320.

It is an arithmetic number, because the mean of its divisors is an integer number (26470320).

Almost surely, 2^52940639 is an apocalyptic number.

52940639 is a deficient number, since it is larger than the sum of its proper divisors (1).

52940639 is an equidigital number, since it uses as much as digits as its factorization.

52940639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 52940639 is about 7276.0318168628. The cubic root of 52940639 is about 375.4882860029.

The spelling of 52940639 in words is "fifty-two million, nine hundred forty thousand, six hundred thirty-nine".