16426447 has 4 divisors (see below), whose sum is σ = 16624440. Its totient is φ = 16228456.

The previous prime is 16426433. The next prime is 16426477. The reversal of 16426447 is 74462461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74462461 = 167 ⋅445883.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16426447 is a prime.

It is a super-2 number, since 2×16426447² = 539656322087618, 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 (16426427) 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, 98872 + ... + 99037.

It is an arithmetic number, because the mean of its divisors is an integer number (4156110).

Almost surely, 2^16426447 is an apocalyptic number.

16426447 is a deficient number, since it is larger than the sum of its proper divisors (197993).

16426447 is an equidigital number, since it uses as much as digits as its factorization.

16426447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197992.

The product of its digits is 32256, while the sum is 34.

The square root of 16426447 is about 4052.9553414761. The cubic root of 16426447 is about 254.2033164505.

The spelling of 16426447 in words is "sixteen million, four hundred twenty-six thousand, four hundred forty-seven".