25717397 has 4 divisors (see below), whose sum is σ = 26315520. Its totient is φ = 25119276.

The previous prime is 25717361. The next prime is 25717399. The reversal of 25717397 is 79371752.

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 25717397 - 2¹⁰ = 25716373 is a prime.

It is a super-2 number, since 2×25717397² = 1322769016911218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25717399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298997 + ... + 299082.

It is an arithmetic number, because the mean of its divisors is an integer number (6578880).

Almost surely, 2^25717397 is an apocalyptic number.

It is an amenable number.

25717397 is a deficient number, since it is larger than the sum of its proper divisors (598123).

25717397 is an equidigital number, since it uses as much as digits as its factorization.

25717397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598122.

The product of its digits is 92610, while the sum is 41.

The square root of 25717397 is about 5071.2322960006. The cubic root of 25717397 is about 295.1723478198.

The spelling of 25717397 in words is "twenty-five million, seven hundred seventeen thousand, three hundred ninety-seven".