16939653 has 4 divisors (see below), whose sum is σ = 22586208. Its totient is φ = 11293100.

The previous prime is 16939631. The next prime is 16939669. The reversal of 16939653 is 35693961.

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 not a de Polignac number, because 16939653 - 2⁶ = 16939589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16939613) 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, 2823273 + ... + 2823278.

It is an arithmetic number, because the mean of its divisors is an integer number (5646552).

Almost surely, 2^16939653 is an apocalyptic number.

It is an amenable number.

16939653 is a deficient number, since it is larger than the sum of its proper divisors (5646555).

16939653 is an equidigital number, since it uses as much as digits as its factorization.

16939653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646554.

The product of its digits is 131220, while the sum is 42.

The square root of 16939653 is about 4115.7809708487. The cubic root of 16939653 is about 256.8235451427.

The spelling of 16939653 in words is "sixteen million, nine hundred thirty-nine thousand, six hundred fifty-three".