15628091 has 2 divisors, whose sum is σ = 15628092. Its totient is φ = 15628090.

The previous prime is 15628073. The next prime is 15628103. The reversal of 15628091 is 19082651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15628091 - 2¹⁰ = 15627067 is a prime.

It is not a weakly prime, because it can be changed into another prime (15628031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7814045 + 7814046.

It is an arithmetic number, because the mean of its divisors is an integer number (7814046).

Almost surely, 2^15628091 is an apocalyptic number.

15628091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15628091 is an equidigital number, since it uses as much as digits as its factorization.

15628091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 15628091 is about 3953.2380398858. The cubic root of 15628091 is about 250.0164842464.

The spelling of 15628091 in words is "fifteen million, six hundred twenty-eight thousand, ninety-one".