172478747 has 8 divisors (see below), whose sum is σ = 203916000. Its totient is φ = 142740864.

The previous prime is 172478737. The next prime is 172478773. The reversal of 172478747 is 747874271.

172478747 is digitally balanced in base 2, 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 not a de Polignac number, because 172478747 - 2¹² = 172474651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172478737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424622 + ... + 425027.

It is an arithmetic number, because the mean of its divisors is an integer number (25489500).

Almost surely, 2^172478747 is an apocalyptic number.

172478747 is a deficient number, since it is larger than the sum of its proper divisors (31437253).

172478747 is an equidigital number, since it uses as much as digits as its factorization.

172478747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849685.

The product of its digits is 614656, while the sum is 47.

The square root of 172478747 is about 13133.1164237587. The cubic root of 172478747 is about 556.6452782409.

The spelling of 172478747 in words is "one hundred seventy-two million, four hundred seventy-eight thousand, seven hundred forty-seven".