15648859 has 2 divisors, whose sum is σ = 15648860. Its totient is φ = 15648858.

The previous prime is 15648827. The next prime is 15648863. The reversal of 15648859 is 95884651.

It is a strong prime.

It is an emirp because it is prime and its reverse (95884651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15648859 - 2⁵ = 15648827 is a prime.

It is not a weakly prime, because it can be changed into another prime (15648869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7824429 + 7824430.

It is an arithmetic number, because the mean of its divisors is an integer number (7824430).

Almost surely, 2^15648859 is an apocalyptic number.

15648859 is a deficient number, since it is larger than the sum of its proper divisors (1).

15648859 is an equidigital number, since it uses as much as digits as its factorization.

15648859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 46.

The square root of 15648859 is about 3955.8638753122. The cubic root of 15648859 is about 250.1271832867.

The spelling of 15648859 in words is "fifteen million, six hundred forty-eight thousand, eight hundred fifty-nine".