172347407 has 4 divisors (see below), whose sum is σ = 172455480. Its totient is φ = 172239336.

The previous prime is 172347401. The next prime is 172347431. The reversal of 172347407 is 704743271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 704743271 = 5779 ⋅121949.

It is a cyclic number.

It is not a de Polignac number, because 172347407 - 2⁴ = 172347391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172347401) 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, 51608 + ... + 54845.

It is an arithmetic number, because the mean of its divisors is an integer number (43113870).

Almost surely, 2^172347407 is an apocalyptic number.

172347407 is a deficient number, since it is larger than the sum of its proper divisors (108073).

172347407 is a wasteful number, since it uses less digits than its factorization.

172347407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108072.

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 172347407 is about 13128.1151350832. The cubic root of 172347407 is about 556.5039499955.

The spelling of 172347407 in words is "one hundred seventy-two million, three hundred forty-seven thousand, four hundred seven".