15963091 has 2 divisors, whose sum is σ = 15963092. Its totient is φ = 15963090.

The previous prime is 15963089. The next prime is 15963121. The reversal of 15963091 is 19036951.

It is a weak prime.

It is an emirp because it is prime and its reverse (19036951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15963091 - 2¹ = 15963089 is a prime.

Together with 15963089, it forms a pair of twin primes.

It is equal to p_1028896 and since 15963091 and 1028896 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (15963061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7981545 + 7981546.

It is an arithmetic number, because the mean of its divisors is an integer number (7981546).

Almost surely, 2^15963091 is an apocalyptic number.

15963091 is a deficient number, since it is larger than the sum of its proper divisors (1).

15963091 is an equidigital number, since it uses as much as digits as its factorization.

15963091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 15963091 is about 3995.3837112348. The cubic root of 15963091 is about 251.7903006899.

The spelling of 15963091 in words is "fifteen million, nine hundred sixty-three thousand, ninety-one".