25406893 has 4 divisors (see below), whose sum is σ = 25536060. Its totient is φ = 25277728.

The previous prime is 25406867. The next prime is 25406897. The reversal of 25406893 is 39860452.

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 18636489 + 6770404 = 4317^2 + 2602^2 .

It is a cyclic number.

It is not a de Polignac number, because 25406893 - 2⁵ = 25406861 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 (25406897) 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, 64288 + ... + 64681.

It is an arithmetic number, because the mean of its divisors is an integer number (6384015).

Almost surely, 2^25406893 is an apocalyptic number.

It is an amenable number.

25406893 is a deficient number, since it is larger than the sum of its proper divisors (129167).

25406893 is a wasteful number, since it uses less digits than its factorization.

25406893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129166.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 25406893 is about 5040.5250718551. The cubic root of 25406893 is about 293.9795942769.

The spelling of 25406893 in words is "twenty-five million, four hundred six thousand, eight hundred ninety-three".