16442973 has 8 divisors (see below), whose sum is σ = 24360000. Its totient is φ = 10961964.

The previous prime is 16442963. The next prime is 16442983. The reversal of 16442973 is 37924461.

16442973 is a `hidden beast` number, since 1 + 644 + 2 + 9 + 7 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (16442963) and next prime (16442983).

It is not a de Polignac number, because 16442973 - 2⁴ = 16442957 is a prime.

It is a super-3 number, since 3×16442973³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16442963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304473 + ... + 304526.

It is an arithmetic number, because the mean of its divisors is an integer number (3045000).

Almost surely, 2^16442973 is an apocalyptic number.

It is an amenable number.

16442973 is a deficient number, since it is larger than the sum of its proper divisors (7917027).

16442973 is an equidigital number, since it uses as much as digits as its factorization.

16442973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609008 (or 609002 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 16442973 is about 4054.9935881577. The cubic root of 16442973 is about 254.2885358528.

The spelling of 16442973 in words is "sixteen million, four hundred forty-two thousand, nine hundred seventy-three".