15196891 has 2 divisors, whose sum is σ = 15196892. Its totient is φ = 15196890.

The previous prime is 15196879. The next prime is 15196897. The reversal of 15196891 is 19869151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15196891 - 2¹¹ = 15194843 is a prime.

It is not a weakly prime, because it can be changed into another prime (15196897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7598445 + 7598446.

It is an arithmetic number, because the mean of its divisors is an integer number (7598446).

Almost surely, 2^15196891 is an apocalyptic number.

15196891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15196891 is an equidigital number, since it uses as much as digits as its factorization.

15196891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 40.

The square root of 15196891 is about 3898.3189966959. The cubic root of 15196891 is about 247.6955757819.

The spelling of 15196891 in words is "fifteen million, one hundred ninety-six thousand, eight hundred ninety-one".