16968623 has 4 divisors (see below), whose sum is σ = 19392720. Its totient is φ = 14544528.

The previous prime is 16968619. The next prime is 16968643. The reversal of 16968623 is 32686961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32686961 = 79 ⋅413759.

It is a cyclic number.

It is not a de Polignac number, because 16968623 - 2² = 16968619 is a prime.

It is a super-2 number, since 2×16968623² = 575868333032258, 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 (16968643) 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, 1212038 + ... + 1212051.

It is an arithmetic number, because the mean of its divisors is an integer number (4848180).

Almost surely, 2^16968623 is an apocalyptic number.

16968623 is a deficient number, since it is larger than the sum of its proper divisors (2424097).

16968623 is an equidigital number, since it uses as much as digits as its factorization.

16968623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424096.

The product of its digits is 93312, while the sum is 41.

The square root of 16968623 is about 4119.2988481051. The cubic root of 16968623 is about 256.9698673206.

The spelling of 16968623 in words is "sixteen million, nine hundred sixty-eight thousand, six hundred twenty-three".