11915639 has 2 divisors, whose sum is σ = 11915640. Its totient is φ = 11915638.

The previous prime is 11915611. The next prime is 11915663. The reversal of 11915639 is 93651911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11915639 - 2¹⁶ = 11850103 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11915599 and 11915608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11915609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5957819 + 5957820.

It is an arithmetic number, because the mean of its divisors is an integer number (5957820).

Almost surely, 2^11915639 is an apocalyptic number.

11915639 is a deficient number, since it is larger than the sum of its proper divisors (1).

11915639 is an equidigital number, since it uses as much as digits as its factorization.

11915639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 35.

The square root of 11915639 is about 3451.9036776828. The cubic root of 11915639 is about 228.4050906062.

The spelling of 11915639 in words is "eleven million, nine hundred fifteen thousand, six hundred thirty-nine".