16427919 has 4 divisors (see below), whose sum is σ = 21903896. Its totient is φ = 10951944.

The previous prime is 16427897. The next prime is 16427981. The reversal of 16427919 is 91972461.

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

It is not a de Polignac number, because 16427919 - 2⁹ = 16427407 is a prime.

It is a super-2 number, since 2×16427919² = 539753045341122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16423919) 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, 2737984 + ... + 2737989.

It is an arithmetic number, because the mean of its divisors is an integer number (5475974).

Almost surely, 2^16427919 is an apocalyptic number.

16427919 is a deficient number, since it is larger than the sum of its proper divisors (5475977).

16427919 is an equidigital number, since it uses as much as digits as its factorization.

16427919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475976.

The product of its digits is 27216, while the sum is 39.

The square root of 16427919 is about 4053.1369332901. The cubic root of 16427919 is about 254.2109094113.

The spelling of 16427919 in words is "sixteen million, four hundred twenty-seven thousand, nine hundred nineteen".