725630123 has 4 divisors (see below), whose sum is σ = 726527880. Its totient is φ = 724732368.

The previous prime is 725630099. The next prime is 725630161. The reversal of 725630123 is 321036527.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725630123 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725630183) 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, 447665 + ... + 449282.

It is an arithmetic number, because the mean of its divisors is an integer number (181631970).

Almost surely, 2^725630123 is an apocalyptic number.

725630123 is a deficient number, since it is larger than the sum of its proper divisors (897757).

725630123 is an equidigital number, since it uses as much as digits as its factorization.

725630123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897756.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 725630123 is about 26937.5225846773. The cubic root of 725630123 is about 898.6110769918.

The spelling of 725630123 in words is "seven hundred twenty-five million, six hundred thirty thousand, one hundred twenty-three".