16397693 has 8 divisors (see below), whose sum is σ = 17959200. Its totient is φ = 14879088.

The previous prime is 16397687. The next prime is 16397699. The reversal of 16397693 is 39679361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16397687) and next prime (16397699).

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 16397693 - 2⁶ = 16397629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16397699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9923 + ... + 11456.

It is an arithmetic number, because the mean of its divisors is an integer number (2244900).

Almost surely, 2^16397693 is an apocalyptic number.

16397693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16397693 is a deficient number, since it is larger than the sum of its proper divisors (1561507).

16397693 is a wasteful number, since it uses less digits than its factorization.

16397693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21451.

The product of its digits is 183708, while the sum is 44.

The square root of 16397693 is about 4049.4064997231. The cubic root of 16397693 is about 254.0549047407.

The spelling of 16397693 in words is "sixteen million, three hundred ninety-seven thousand, six hundred ninety-three".