172345394 has 16 divisors (see below), whose sum is σ = 290509632. Its totient is φ = 76085328.

The previous prime is 172345387. The next prime is 172345403. The reversal of 172345394 is 493543271.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143504 + ... + 144699.

It is an arithmetic number, because the mean of its divisors is an integer number (18156852).

Almost surely, 2^172345394 is an apocalyptic number.

172345394 is a deficient number, since it is larger than the sum of its proper divisors (118164238).

172345394 is a wasteful number, since it uses less digits than its factorization.

172345394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288241.

The product of its digits is 90720, while the sum is 38.

The square root of 172345394 is about 13128.0384673416. The cubic root of 172345394 is about 556.5017833507.

The spelling of 172345394 in words is "one hundred seventy-two million, three hundred forty-five thousand, three hundred ninety-four".