15591659 has 2 divisors, whose sum is σ = 15591660. Its totient is φ = 15591658.

The previous prime is 15591649. The next prime is 15591701. The reversal of 15591659 is 95619551.

It is a weak prime.

It is an emirp because it is prime and its reverse (95619551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15591659 - 2¹⁶ = 15526123 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (15591649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7795829 + 7795830.

It is an arithmetic number, because the mean of its divisors is an integer number (7795830).

Almost surely, 2^15591659 is an apocalyptic number.

15591659 is a deficient number, since it is larger than the sum of its proper divisors (1).

15591659 is an equidigital number, since it uses as much as digits as its factorization.

15591659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60750, while the sum is 41.

The square root of 15591659 is about 3948.6274830629. The cubic root of 15591659 is about 249.8220547053.

The spelling of 15591659 in words is "fifteen million, five hundred ninety-one thousand, six hundred fifty-nine".