16421079 has 4 divisors (see below), whose sum is σ = 21894776. Its totient is φ = 10947384.

The previous prime is 16421071. The next prime is 16421087. The reversal of 16421079 is 97012461.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (16421071) and next prime (16421087).

It is not a de Polignac number, because 16421079 - 2³ = 16421071 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 (16421071) 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, 2736844 + ... + 2736849.

It is an arithmetic number, because the mean of its divisors is an integer number (5473694).

Almost surely, 2^16421079 is an apocalyptic number.

16421079 is a deficient number, since it is larger than the sum of its proper divisors (5473697).

16421079 is an equidigital number, since it uses as much as digits as its factorization.

16421079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473696.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 16421079 is about 4052.2930545557. The cubic root of 16421079 is about 254.1756230592.

The spelling of 16421079 in words is "sixteen million, four hundred twenty-one thousand, seventy-nine".