172091344 has 10 divisors (see below), whose sum is σ = 333427010. Its totient is φ = 86045664.

The previous prime is 172091333. The next prime is 172091347. The reversal of 172091344 is 443190271.

It can be written as a sum of positive squares in only one way, i.e., 132250000 + 39841344 = 11500^2 + 6312^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172091347) by changing a digit.

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 as a sum of consecutive naturals, namely, 5377839 + ... + 5377870.

It is an arithmetic number, because the mean of its divisors is an integer number (33342701).

Almost surely, 2^172091344 is an apocalyptic number.

It is an amenable number.

172091344 is a deficient number, since it is larger than the sum of its proper divisors (161335666).

172091344 is a wasteful number, since it uses less digits than its factorization.

172091344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10755717 (or 10755711 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 172091344 is about 13118.3590437219. The cubic root of 172091344 is about 556.2282071334.

The spelling of 172091344 in words is "one hundred seventy-two million, ninety-one thousand, three hundred forty-four".