15690379 has 4 divisors (see below), whose sum is σ = 15706360. Its totient is φ = 15674400.

The previous prime is 15690349. The next prime is 15690431. The reversal of 15690379 is 97309651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97309651 = 31 ⋅3139021.

It is a cyclic number.

It is not a de Polignac number, because 15690379 - 2⁷ = 15690251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15690319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6414 + ... + 8515.

It is an arithmetic number, because the mean of its divisors is an integer number (3926590).

Almost surely, 2^15690379 is an apocalyptic number.

15690379 is a deficient number, since it is larger than the sum of its proper divisors (15981).

15690379 is a wasteful number, since it uses less digits than its factorization.

15690379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15980.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 15690379 is about 3961.1083045027. The cubic root of 15690379 is about 250.3482027941.

The spelling of 15690379 in words is "fifteen million, six hundred ninety thousand, three hundred seventy-nine".