925881409 has 4 divisors (see below), whose sum is σ = 930678916. Its totient is φ = 921083904.

The previous prime is 925881391. The next prime is 925881413. The reversal of 925881409 is 904188529.

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

It can be written as a sum of positive squares in 2 ways, for example, as 220819600 + 705061809 = 14860^2 + 26553^2 .

It is a cyclic number.

It is not a de Polignac number, because 925881409 - 2⁹ = 925880897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (925881449) 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, 2398464 + ... + 2398849.

It is an arithmetic number, because the mean of its divisors is an integer number (232669729).

Almost surely, 2^925881409 is an apocalyptic number.

It is an amenable number.

925881409 is a deficient number, since it is larger than the sum of its proper divisors (4797507).

925881409 is a wasteful number, since it uses less digits than its factorization.

925881409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797506.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 925881409 is about 30428.2994759812. The cubic root of 925881409 is about 974.6569589602.

The spelling of 925881409 in words is "nine hundred twenty-five million, eight hundred eighty-one thousand, four hundred nine".