16692397 has 4 divisors (see below), whose sum is σ = 16798876. Its totient is φ = 16585920.

The previous prime is 16692391. The next prime is 16692409. The reversal of 16692397 is 79329661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79329661 = 127 ⋅624643.

It can be written as a sum of positive squares in 2 ways, for example, as 1552516 + 15139881 = 1246^2 + 3891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16692397 is a prime.

It is a super-2 number, since 2×16692397² = 557272235211218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16692391) 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, 53004 + ... + 53317.

It is an arithmetic number, because the mean of its divisors is an integer number (4199719).

Almost surely, 2^16692397 is an apocalyptic number.

It is an amenable number.

16692397 is a deficient number, since it is larger than the sum of its proper divisors (106479).

16692397 is a wasteful number, since it uses less digits than its factorization.

16692397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106478.

The product of its digits is 122472, while the sum is 43.

The square root of 16692397 is about 4085.6329986919. The cubic root of 16692397 is about 255.5678591920.

The spelling of 16692397 in words is "sixteen million, six hundred ninety-two thousand, three hundred ninety-seven".