172747394 has 8 divisors (see below), whose sum is σ = 261414540. Its totient is φ = 85609216.

The previous prime is 172747381. The next prime is 172747409. The reversal of 172747394 is 493747271.

It can be written as a sum of positive squares in 2 ways, for example, as 171217225 + 1530169 = 13085^2 + 1237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381959 + ... + 382410.

Almost surely, 2^172747394 is an apocalyptic number.

172747394 is a deficient number, since it is larger than the sum of its proper divisors (88667146).

172747394 is a wasteful number, since it uses less digits than its factorization.

172747394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764484.

The product of its digits is 296352, while the sum is 44.

The square root of 172747394 is about 13143.3402908089. The cubic root of 172747394 is about 556.9341322084.

The spelling of 172747394 in words is "one hundred seventy-two million, seven hundred forty-seven thousand, three hundred ninety-four".