172947190 has 32 divisors (see below), whose sum is σ = 335837376. Its totient is φ = 63745920.

The previous prime is 172947179. The next prime is 172947191. The reversal of 172947190 is 91749271.

It is a super-2 number, since 2×172947190² = 59821461057792200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172947191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132079 + ... + 133381.

It is an arithmetic number, because the mean of its divisors is an integer number (10494918).

Almost surely, 2^172947190 is an apocalyptic number.

172947190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172947190 is a deficient number, since it is larger than the sum of its proper divisors (162890186).

172947190 is a wasteful number, since it uses less digits than its factorization.

172947190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 172947190 is about 13150.9387497623. The cubic root of 172947190 is about 557.1487622492.

The spelling of 172947190 in words is "one hundred seventy-two million, nine hundred forty-seven thousand, one hundred ninety".