15690697 has 4 divisors (see below), whose sum is σ = 17117136. Its totient is φ = 14264260.

The previous prime is 15690683. The next prime is 15690721. The reversal of 15690697 is 79609651.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15690697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15690667) 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, 713203 + ... + 713224.

It is an arithmetic number, because the mean of its divisors is an integer number (4279284).

Almost surely, 2^15690697 is an apocalyptic number.

It is an amenable number.

15690697 is a deficient number, since it is larger than the sum of its proper divisors (1426439).

15690697 is a wasteful number, since it uses less digits than its factorization.

15690697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426438.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 15690697 is about 3961.1484445802. The cubic root of 15690697 is about 250.3498940681.

The spelling of 15690697 in words is "fifteen million, six hundred ninety thousand, six hundred ninety-seven".