172707381 has 24 divisors (see below), whose sum is σ = 311024064. Its totient is φ = 89717760.

The previous prime is 172707371. The next prime is 172707389. The reversal of 172707381 is 183707271.

It is a happy number.

172707381 is a `hidden beast` number, since 1 + 7 + 270 + 7 + 381 = 666.

172707381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172707381 - 2⁵ = 172707349 is a prime.

It is a super-2 number, since 2×172707381² = 59655678903758322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172707389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123916 + ... + 125301.

It is an arithmetic number, because the mean of its divisors is an integer number (12959336).

Almost surely, 2^172707381 is an apocalyptic number.

172707381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

172707381 is a deficient number, since it is larger than the sum of its proper divisors (138316683).

172707381 is a wasteful number, since it uses less digits than its factorization.

172707381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249241 (or 249238 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 36.

The square root of 172707381 is about 13141.8180249157. The cubic root of 172707381 is about 556.8911285182.

The spelling of 172707381 in words is "one hundred seventy-two million, seven hundred seven thousand, three hundred eighty-one".