16629973 has 4 divisors (see below), whose sum is σ = 16646848. Its totient is φ = 16613100.

The previous prime is 16629967. The next prime is 16630007. The reversal of 16629973 is 37992661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16629973 - 2⁵ = 16629941 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 (16629923) 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, 6861 + ... + 8962.

It is an arithmetic number, because the mean of its divisors is an integer number (4161712).

Almost surely, 2^16629973 is an apocalyptic number.

It is an amenable number.

16629973 is a deficient number, since it is larger than the sum of its proper divisors (16875).

16629973 is a wasteful number, since it uses less digits than its factorization.

16629973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16874.

The product of its digits is 122472, while the sum is 43.

The square root of 16629973 is about 4077.9863903647. The cubic root of 16629973 is about 255.2488817064.

The spelling of 16629973 in words is "sixteen million, six hundred twenty-nine thousand, nine hundred seventy-three".