16697693 has 6 divisors (see below), whose sum is σ = 17162586. Its totient is φ = 16245072.

The previous prime is 16697687. The next prime is 16697699. The reversal of 16697693 is 39679661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16697687) and next prime (16697699).

It can be written as a sum of positive squares in 3 ways, for example, as 11142244 + 5555449 = 3338^2 + 2357^2 .

It is not a de Polignac number, because 16697693 - 2¹² = 16693597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16697699) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4730 + ... + 7467.

It is an arithmetic number, because the mean of its divisors is an integer number (2860431).

Almost surely, 2^16697693 is an apocalyptic number.

It is an amenable number.

16697693 is a deficient number, since it is larger than the sum of its proper divisors (464893).

16697693 is an equidigital number, since it uses as much as digits as its factorization.

16697693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12271 (or 12234 counting only the distinct ones).

The product of its digits is 367416, while the sum is 47.

The square root of 16697693 is about 4086.2810720752. The cubic root of 16697693 is about 255.5948843553.

The spelling of 16697693 in words is "sixteen million, six hundred ninety-seven thousand, six hundred ninety-three".