16973391 has 8 divisors (see below), whose sum is σ = 22831920. Its totient is φ = 11215232.

The previous prime is 16973377. The next prime is 16973401. The reversal of 16973391 is 19337961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16973391 - 2⁷ = 16973263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16973321) 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, 24696 + ... + 25373.

It is an arithmetic number, because the mean of its divisors is an integer number (2853990).

Almost surely, 2^16973391 is an apocalyptic number.

16973391 is a deficient number, since it is larger than the sum of its proper divisors (5858529).

16973391 is a wasteful number, since it uses less digits than its factorization.

16973391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50185.

The product of its digits is 30618, while the sum is 39.

The square root of 16973391 is about 4119.8775467239. The cubic root of 16973391 is about 256.9939336534.

The spelling of 16973391 in words is "sixteen million, nine hundred seventy-three thousand, three hundred ninety-one".