52409639 has 2 divisors, whose sum is σ = 52409640. Its totient is φ = 52409638.

The previous prime is 52409597. The next prime is 52409671. The reversal of 52409639 is 93690425.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52409639 is a prime.

It is a super-2 number, since 2×52409639² = 5493540520220642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52409689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26204819 + 26204820.

It is an arithmetic number, because the mean of its divisors is an integer number (26204820).

Almost surely, 2^52409639 is an apocalyptic number.

52409639 is a deficient number, since it is larger than the sum of its proper divisors (1).

52409639 is an equidigital number, since it uses as much as digits as its factorization.

52409639 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 52409639 is about 7239.4501863056. The cubic root of 52409639 is about 374.2286699618.

The spelling of 52409639 in words is "fifty-two million, four hundred nine thousand, six hundred thirty-nine".