25706493 has 24 divisors (see below), whose sum is σ = 38188800. Its totient is φ = 16657344.

The previous prime is 25706489. The next prime is 25706501. The reversal of 25706493 is 39460752.

25706493 is a `hidden beast` number, since 2 + 5 + 7 + 0 + 649 + 3 = 666.

It is not a de Polignac number, because 25706493 - 2² = 25706489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25706413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53428 + ... + 53906.

It is an arithmetic number, because the mean of its divisors is an integer number (1591200).

Almost surely, 2^25706493 is an apocalyptic number.

It is an amenable number.

25706493 is a deficient number, since it is larger than the sum of its proper divisors (12482307).

25706493 is a wasteful number, since it uses less digits than its factorization.

25706493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 25706493 is about 5070.1570981578. The cubic root of 25706493 is about 295.1306249052.

The spelling of 25706493 in words is "twenty-five million, seven hundred six thousand, four hundred ninety-three".