153972129 has 4 divisors (see below), whose sum is σ = 205296176. Its totient is φ = 102648084.

The previous prime is 153972109. The next prime is 153972131. The reversal of 153972129 is 921279351.

153972129 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 153972129 - 2⁷ = 153972001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153972109) 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, 25662019 + ... + 25662024.

It is an arithmetic number, because the mean of its divisors is an integer number (51324044).

Almost surely, 2^153972129 is an apocalyptic number.

It is an amenable number.

153972129 is a deficient number, since it is larger than the sum of its proper divisors (51324047).

153972129 is an equidigital number, since it uses as much as digits as its factorization.

153972129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51324046.

The product of its digits is 34020, while the sum is 39.

The square root of 153972129 is about 12408.5506405865. The cubic root of 153972129 is about 535.9785033055.

The spelling of 153972129 in words is "one hundred fifty-three million, nine hundred seventy-two thousand, one hundred twenty-nine".