16642079 has 4 divisors (see below), whose sum is σ = 16654176. Its totient is φ = 16629984.

The previous prime is 16642069. The next prime is 16642091. The reversal of 16642079 is 97024661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16642079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16642039) 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, 3674 + ... + 6839.

It is an arithmetic number, because the mean of its divisors is an integer number (4163544).

Almost surely, 2^16642079 is an apocalyptic number.

16642079 is a deficient number, since it is larger than the sum of its proper divisors (12097).

16642079 is a wasteful number, since it uses less digits than its factorization.

16642079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12096.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 16642079 is about 4079.4704313183. The cubic root of 16642079 is about 255.3108039046.

The spelling of 16642079 in words is "sixteen million, six hundred forty-two thousand, seventy-nine".