172679427 has 12 divisors (see below), whose sum is σ = 258027120. Its totient is φ = 111149808.

The previous prime is 172679411. The next prime is 172679447. The reversal of 172679427 is 724976271.

It is not a de Polignac number, because 172679427 - 2⁴ = 172679411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172679447) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 330543 + ... + 331064.

It is an arithmetic number, because the mean of its divisors is an integer number (21502260).

Almost surely, 2^172679427 is an apocalyptic number.

172679427 is a deficient number, since it is larger than the sum of its proper divisors (85347693).

172679427 is a wasteful number, since it uses less digits than its factorization.

172679427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661642 (or 661639 counting only the distinct ones).

The product of its digits is 296352, while the sum is 45.

The square root of 172679427 is about 13140.7544303971. The cubic root of 172679427 is about 556.8610812122.

The spelling of 172679427 in words is "one hundred seventy-two million, six hundred seventy-nine thousand, four hundred twenty-seven".