15491093 has 2 divisors, whose sum is σ = 15491094. Its totient is φ = 15491092.

The previous prime is 15491053. The next prime is 15491107. The reversal of 15491093 is 39019451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12794929 + 2696164 = 3577^2 + 1642^2 .

It is a cyclic number.

It is not a de Polignac number, because 15491093 - 2¹² = 15486997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15491053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7745546 + 7745547.

It is an arithmetic number, because the mean of its divisors is an integer number (7745547).

Almost surely, 2^15491093 is an apocalyptic number.

It is an amenable number.

15491093 is a deficient number, since it is larger than the sum of its proper divisors (1).

15491093 is an equidigital number, since it uses as much as digits as its factorization.

15491093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 15491093 is about 3935.8725843198. The cubic root of 15491093 is about 249.2837794050.

The spelling of 15491093 in words is "fifteen million, four hundred ninety-one thousand, ninety-three".