16429979 has 4 divisors (see below), whose sum is σ = 16996560. Its totient is φ = 15863400.

The previous prime is 16429967. The next prime is 16429991. The reversal of 16429979 is 97992461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97992461 = 7 ⋅13998923.

It is an interprime number because it is at equal distance from previous prime (16429967) and next prime (16429991).

It is a cyclic number.

It is not a de Polignac number, because 16429979 - 2⁸ = 16429723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16429909) 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, 283247 + ... + 283304.

It is an arithmetic number, because the mean of its divisors is an integer number (4249140).

Almost surely, 2^16429979 is an apocalyptic number.

16429979 is a deficient number, since it is larger than the sum of its proper divisors (566581).

16429979 is an equidigital number, since it uses as much as digits as its factorization.

16429979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566580.

The product of its digits is 244944, while the sum is 47.

The square root of 16429979 is about 4053.3910494794. The cubic root of 16429979 is about 254.2215346683.

The spelling of 16429979 in words is "sixteen million, four hundred twenty-nine thousand, nine hundred seventy-nine".