172973936 has 20 divisors (see below), whose sum is σ = 335395200. Its totient is φ = 86420352.

The previous prime is 172973923. The next prime is 172973939. The reversal of 172973936 is 639379271.

It is a happy number.

172973936 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172973939) 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, 22385 + ... + 29103.

It is an arithmetic number, because the mean of its divisors is an integer number (16769760).

Almost surely, 2^172973936 is an apocalyptic number.

172973936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

172973936 is a deficient number, since it is larger than the sum of its proper divisors (162421264).

172973936 is a wasteful number, since it uses less digits than its factorization.

172973936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8336 (or 8330 counting only the distinct ones).

The product of its digits is 428652, while the sum is 47.

The square root of 172973936 is about 13151.9555960321. The cubic root of 172973936 is about 557.1774814836.

The spelling of 172973936 in words is "one hundred seventy-two million, nine hundred seventy-three thousand, nine hundred thirty-six".