17972993 has 8 divisors (see below), whose sum is σ = 19240800. Its totient is φ = 16737408.

The previous prime is 17972987. The next prime is 17973017. The reversal of 17972993 is 39927971.

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 17972993 - 2¹⁰ = 17971969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17972293) 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, 6896 + ... + 9137.

It is an arithmetic number, because the mean of its divisors is an integer number (2405100).

Almost surely, 2^17972993 is an apocalyptic number.

It is an amenable number.

17972993 is a deficient number, since it is larger than the sum of its proper divisors (1267807).

17972993 is a wasteful number, since it uses less digits than its factorization.

17972993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16111.

The product of its digits is 214326, while the sum is 47.

The square root of 17972993 is about 4239.4566868881. The cubic root of 17972993 is about 261.9430027714.

The spelling of 17972993 in words is "seventeen million, nine hundred seventy-two thousand, nine hundred ninety-three".