725135387 has 4 divisors (see below), whose sum is σ = 725446176. Its totient is φ = 724824600.

The previous prime is 725135381. The next prime is 725135407. The reversal of 725135387 is 783531527.

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-725135387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725135381) 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, 151868 + ... + 156569.

It is an arithmetic number, because the mean of its divisors is an integer number (181361544).

Almost surely, 2^725135387 is an apocalyptic number.

725135387 is a deficient number, since it is larger than the sum of its proper divisors (310789).

725135387 is a wasteful number, since it uses less digits than its factorization.

725135387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310788.

The product of its digits is 176400, while the sum is 41.

The square root of 725135387 is about 26928.3379917885. The cubic root of 725135387 is about 898.4068056460.

The spelling of 725135387 in words is "seven hundred twenty-five million, one hundred thirty-five thousand, three hundred eighty-seven".