16697377 has 4 divisors (see below), whose sum is σ = 16707460. Its totient is φ = 16687296.

The previous prime is 16697353. The next prime is 16697381. The reversal of 16697377 is 77379661.

It is a happy number.

16697377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 77379661 = 43 ⋅1799527.

It can be written as a sum of positive squares in 2 ways, for example, as 7929856 + 8767521 = 2816^2 + 2961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16697377 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16698377) 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, 1908 + ... + 6085.

It is an arithmetic number, because the mean of its divisors is an integer number (4176865).

Almost surely, 2^16697377 is an apocalyptic number.

It is an amenable number.

16697377 is a deficient number, since it is larger than the sum of its proper divisors (10083).

16697377 is an equidigital number, since it uses as much as digits as its factorization.

16697377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10082.

The product of its digits is 333396, while the sum is 46.

The square root of 16697377 is about 4086.2424059275. The cubic root of 16697377 is about 255.5932719870.

The spelling of 16697377 in words is "sixteen million, six hundred ninety-seven thousand, three hundred seventy-seven".