15969397 has 4 divisors (see below), whose sum is σ = 16014240. Its totient is φ = 15924556.

The previous prime is 15969389. The next prime is 15969439. The reversal of 15969397 is 79396951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79396951 = 41 ⋅1936511.

It is a cyclic number.

It is not a de Polignac number, because 15969397 - 2³ = 15969389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15969397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15969197) 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, 21883 + ... + 22600.

It is an arithmetic number, because the mean of its divisors is an integer number (4003560).

Almost surely, 2^15969397 is an apocalyptic number.

It is an amenable number.

15969397 is a deficient number, since it is larger than the sum of its proper divisors (44843).

15969397 is an equidigital number, since it uses as much as digits as its factorization.

15969397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44842.

The product of its digits is 459270, while the sum is 49.

The square root of 15969397 is about 3996.1727940618. The cubic root of 15969397 is about 251.8234517591.

The spelling of 15969397 in words is "fifteen million, nine hundred sixty-nine thousand, three hundred ninety-seven".