172472643 has 12 divisors (see below), whose sum is σ = 284716848. Its totient is φ = 98555760.

The previous prime is 172472639. The next prime is 172472687. The reversal of 172472643 is 346274271.

172472643 is a `hidden beast` number, since 1 + 7 + 2 + 4 + 7 + 2 + 643 = 666.

172472643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172472643 - 2² = 172472639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172472598 and 172472607.

It is not an unprimeable number, because it can be changed into a prime (172472603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1368768 + ... + 1368893.

It is an arithmetic number, because the mean of its divisors is an integer number (23726404).

Almost surely, 2^172472643 is an apocalyptic number.

172472643 is a deficient number, since it is larger than the sum of its proper divisors (112244205).

172472643 is a wasteful number, since it uses less digits than its factorization.

172472643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2737674 (or 2737671 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 172472643 is about 13132.8840320776. The cubic root of 172472643 is about 556.6387116292.

The spelling of 172472643 in words is "one hundred seventy-two million, four hundred seventy-two thousand, six hundred forty-three".