725127709 has 4 divisors (see below), whose sum is σ = 730837504. Its totient is φ = 719417916.

The previous prime is 725127677. The next prime is 725127731. The reversal of 725127709 is 907721527.

It is a happy number.

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 725127709 - 2⁵ = 725127677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725127749) 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, 2854707 + ... + 2854960.

It is an arithmetic number, because the mean of its divisors is an integer number (182709376).

Almost surely, 2^725127709 is an apocalyptic number.

It is an amenable number.

725127709 is a deficient number, since it is larger than the sum of its proper divisors (5709795).

725127709 is a wasteful number, since it uses less digits than its factorization.

725127709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5709794.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 725127709 is about 26928.1954278411. The cubic root of 725127709 is about 898.4036347476.

The spelling of 725127709 in words is "seven hundred twenty-five million, one hundred twenty-seven thousand, seven hundred nine".