16404379 has 4 divisors (see below), whose sum is σ = 16499376. Its totient is φ = 16309384.

The previous prime is 16404373. The next prime is 16404389. The reversal of 16404379 is 97340461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97340461 = 3359 ⋅28979.

It is a cyclic number.

It is not a de Polignac number, because 16404379 - 2⁷ = 16404251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16404373) 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, 47239 + ... + 47584.

It is an arithmetic number, because the mean of its divisors is an integer number (4124844).

Almost surely, 2^16404379 is an apocalyptic number.

16404379 is a deficient number, since it is larger than the sum of its proper divisors (94997).

16404379 is an equidigital number, since it uses as much as digits as its factorization.

16404379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94996.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 16404379 is about 4050.2319686655. The cubic root of 16404379 is about 254.0894295218.

The spelling of 16404379 in words is "sixteen million, four hundred four thousand, three hundred seventy-nine".