13172905 has 8 divisors (see below), whose sum is σ = 16494912. Its totient is φ = 10080048.

The previous prime is 13172897. The next prime is 13172911. The reversal of 13172905 is 50927131.

13172905 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13172905 - 2³ = 13172897 is a prime.

It is a super-2 number, since 2×13172905² = 347050852278050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57159 + ... + 57388.

It is an arithmetic number, because the mean of its divisors is an integer number (2061864).

Almost surely, 2^13172905 is an apocalyptic number.

It is an amenable number.

13172905 is a deficient number, since it is larger than the sum of its proper divisors (3322007).

13172905 is a wasteful number, since it uses less digits than its factorization.

13172905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114575.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 13172905 is about 3629.4496828032. The cubic root of 13172905 is about 236.1713361275.

The spelling of 13172905 in words is "thirteen million, one hundred seventy-two thousand, nine hundred five".