172358397 has 12 divisors (see below), whose sum is σ = 257547420. Its totient is φ = 110943168.

The previous prime is 172358387. The next prime is 172358399. The reversal of 172358397 is 793853271.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55264356 + 117094041 = 7434^2 + 10821^2 .

It is not a de Polignac number, because 172358397 - 2⁷ = 172358269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172358399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 329928 + ... + 330449.

It is an arithmetic number, because the mean of its divisors is an integer number (21462285).

Almost surely, 2^172358397 is an apocalyptic number.

It is an amenable number.

172358397 is a deficient number, since it is larger than the sum of its proper divisors (85189023).

172358397 is a wasteful number, since it uses less digits than its factorization.

172358397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660412 (or 660409 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 172358397 is about 13128.5336957331. The cubic root of 172358397 is about 556.5157785235.

The spelling of 172358397 in words is "one hundred seventy-two million, three hundred fifty-eight thousand, three hundred ninety-seven".