16601623 has 2 divisors, whose sum is σ = 16601624. Its totient is φ = 16601622.

The previous prime is 16601609. The next prime is 16601633. The reversal of 16601623 is 32610661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16601623 - 2⁵ = 16601591 is a prime.

It is a super-2 number, since 2×16601623² = 551227772468258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16601603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8300811 + 8300812.

It is an arithmetic number, because the mean of its divisors is an integer number (8300812).

Almost surely, 2^16601623 is an apocalyptic number.

16601623 is a deficient number, since it is larger than the sum of its proper divisors (1).

16601623 is an equidigital number, since it uses as much as digits as its factorization.

16601623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 16601623 is about 4074.5089274660. The cubic root of 16601623 is about 255.1037537551.

The spelling of 16601623 in words is "sixteen million, six hundred one thousand, six hundred twenty-three".