172042743 has 4 divisors (see below), whose sum is σ = 229390328. Its totient is φ = 114695160.

The previous prime is 172042723. The next prime is 172042757. The reversal of 172042743 is 347240271.

172042743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-172042743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172042743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172042723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28673788 + ... + 28673793.

It is an arithmetic number, because the mean of its divisors is an integer number (57347582).

Almost surely, 2^172042743 is an apocalyptic number.

172042743 is a deficient number, since it is larger than the sum of its proper divisors (57347585).

172042743 is an equidigital number, since it uses as much as digits as its factorization.

172042743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57347584.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 172042743 is about 13116.5065089756. The cubic root of 172042743 is about 556.1758399976.

The spelling of 172042743 in words is "one hundred seventy-two million, forty-two thousand, seven hundred forty-three".