172480491 has 6 divisors (see below), whose sum is σ = 249138500. Its totient is φ = 114986988.

The previous prime is 172480417. The next prime is 172480501. The reversal of 172480491 is 194084271.

172480491 is a `hidden beast` number, since 172 + 480 + 4 + 9 + 1 = 666.

It is not a de Polignac number, because 172480491 - 2¹⁴ = 172464107 is a prime.

It is a super-3 number, since 3×172480491³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172480411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9582241 + ... + 9582258.

Almost surely, 2^172480491 is an apocalyptic number.

172480491 is a deficient number, since it is larger than the sum of its proper divisors (76658009).

172480491 is a wasteful number, since it uses less digits than its factorization.

172480491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19164505 (or 19164502 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 172480491 is about 13133.1828206265. The cubic root of 172480491 is about 556.6471543872.

It can be divided in two parts, 1724 and 80491, that added together give a triangular number (82215 = T₄₀₅).

The spelling of 172480491 in words is "one hundred seventy-two million, four hundred eighty thousand, four hundred ninety-one".