13525639 has 2 divisors, whose sum is σ = 13525640. Its totient is φ = 13525638.

The previous prime is 13525601. The next prime is 13525649. The reversal of 13525639 is 93652531.

It is a happy number.

13525639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13525639 - 2¹³ = 13517447 is a prime.

It is equal to p₈₈₁₁₇₉ and since 13525639 and 881179 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13525649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6762819 + 6762820.

It is an arithmetic number, because the mean of its divisors is an integer number (6762820).

Almost surely, 2^13525639 is an apocalyptic number.

13525639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13525639 is an equidigital number, since it uses as much as digits as its factorization.

13525639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 34.

The square root of 13525639 is about 3677.7219851424. The cubic root of 13525639 is about 238.2608008971.

The spelling of 13525639 in words is "thirteen million, five hundred twenty-five thousand, six hundred thirty-nine".