15961379 has 8 divisors (see below), whose sum is σ = 19034880. Its totient is φ = 13086216.

The previous prime is 15961367. The next prime is 15961381. The reversal of 15961379 is 97316951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15961379 - 2¹⁶ = 15895843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15961399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49409 + ... + 49730.

It is an arithmetic number, because the mean of its divisors is an integer number (2379360).

Almost surely, 2^15961379 is an apocalyptic number.

15961379 is a deficient number, since it is larger than the sum of its proper divisors (3073501).

15961379 is an equidigital number, since it uses as much as digits as its factorization.

15961379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99169.

The product of its digits is 51030, while the sum is 41.

The square root of 15961379 is about 3995.1694582333. The cubic root of 15961379 is about 251.7812990831.

The spelling of 15961379 in words is "fifteen million, nine hundred sixty-one thousand, three hundred seventy-nine".