724565129 has 4 divisors (see below), whose sum is σ = 726925584. Its totient is φ = 722204676.

The previous prime is 724565123. The next prime is 724565141. The reversal of 724565129 is 921565427.

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 a cyclic number.

It is not a de Polignac number, because 724565129 - 2²⁰ = 723516553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (724565123) 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, 1179767 + ... + 1180380.

It is an arithmetic number, because the mean of its divisors is an integer number (181731396).

Almost surely, 2^724565129 is an apocalyptic number.

It is an amenable number.

724565129 is a deficient number, since it is larger than the sum of its proper divisors (2360455).

724565129 is a wasteful number, since it uses less digits than its factorization.

724565129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360454.

The product of its digits is 151200, while the sum is 41.

The square root of 724565129 is about 26917.7474726248. The cubic root of 724565129 is about 898.1712367504.

The spelling of 724565129 in words is "seven hundred twenty-four million, five hundred sixty-five thousand, one hundred twenty-nine".