285725397 has 4 divisors (see below), whose sum is σ = 380967200. Its totient is φ = 190483596.

The previous prime is 285725393. The next prime is 285725423. The reversal of 285725397 is 793527582.

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 285725397 - 2² = 285725393 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 (285725393) 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, 47620897 + ... + 47620902.

It is an arithmetic number, because the mean of its divisors is an integer number (95241800).

Almost surely, 2^285725397 is an apocalyptic number.

It is an amenable number.

285725397 is a deficient number, since it is larger than the sum of its proper divisors (95241803).

285725397 is an equidigital number, since it uses as much as digits as its factorization.

285725397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95241802.

The product of its digits is 1058400, while the sum is 48.

The square root of 285725397 is about 16903.4137676388. The cubic root of 285725397 is about 658.6422938768.

The spelling of 285725397 in words is "two hundred eighty-five million, seven hundred twenty-five thousand, three hundred ninety-seven".