825575917 has 4 divisors (see below), whose sum is σ = 829898496. Its totient is φ = 821253340.

The previous prime is 825575899. The next prime is 825575921. The reversal of 825575917 is 719575528.

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 825575917 - 2²⁷ = 691358189 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 (825575957) 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, 2161003 + ... + 2161384.

It is an arithmetic number, because the mean of its divisors is an integer number (207474624).

Almost surely, 2^825575917 is an apocalyptic number.

It is an amenable number.

825575917 is a deficient number, since it is larger than the sum of its proper divisors (4322579).

825575917 is a wasteful number, since it uses less digits than its factorization.

825575917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4322578.

The product of its digits is 882000, while the sum is 49.

The square root of 825575917 is about 28732.8369117983. The cubic root of 825575917 is about 938.1069177531.

The spelling of 825575917 in words is "eight hundred twenty-five million, five hundred seventy-five thousand, nine hundred seventeen".