172704047 has 4 divisors (see below), whose sum is σ = 172730760. Its totient is φ = 172677336.

The previous prime is 172704031. The next prime is 172704061. The reversal of 172704047 is 740407271.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 172704047 - 2⁴ = 172704031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172704017) 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 in 3 ways as a sum of consecutive naturals, for example, 3104 + ... + 18842.

It is an arithmetic number, because the mean of its divisors is an integer number (43182690).

Almost surely, 2^172704047 is an apocalyptic number.

172704047 is a deficient number, since it is larger than the sum of its proper divisors (26713).

172704047 is a wasteful number, since it uses less digits than its factorization.

172704047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26712.

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 172704047 is about 13141.6911773181. The cubic root of 172704047 is about 556.8875450254.

The spelling of 172704047 in words is "one hundred seventy-two million, seven hundred four thousand, forty-seven".