172901429 has 4 divisors (see below), whose sum is σ = 172976076. Its totient is φ = 172826784.

The previous prime is 172901411. The next prime is 172901497. The reversal of 172901429 is 924109271.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27144100 + 145757329 = 5210^2 + 12073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172901429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172904429) 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, 33734 + ... + 38519.

It is an arithmetic number, because the mean of its divisors is an integer number (43244019).

Almost surely, 2^172901429 is an apocalyptic number.

It is an amenable number.

172901429 is a deficient number, since it is larger than the sum of its proper divisors (74647).

172901429 is an equidigital number, since it uses as much as digits as its factorization.

172901429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74646.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 172901429 is about 13149.1987968849. The cubic root of 172901429 is about 557.0996182812.

The spelling of 172901429 in words is "one hundred seventy-two million, nine hundred one thousand, four hundred twenty-nine".