25799497 has 4 divisors (see below), whose sum is σ = 25818640. Its totient is φ = 25780356.

The previous prime is 25799479. The next prime is 25799507. The reversal of 25799497 is 79499752.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-25799497 is a prime.

It is a super-2 number, since 2×25799497² = 1331228090906018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25799437) 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, 7383 + ... + 10300.

It is an arithmetic number, because the mean of its divisors is an integer number (6454660).

Almost surely, 2^25799497 is an apocalyptic number.

It is an amenable number.

25799497 is a deficient number, since it is larger than the sum of its proper divisors (19143).

25799497 is a wasteful number, since it uses less digits than its factorization.

25799497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19142.

The product of its digits is 1428840, while the sum is 52.

The square root of 25799497 is about 5079.3205254246. The cubic root of 25799497 is about 295.4861160655.

The spelling of 25799497 in words is "twenty-five million, seven hundred ninety-nine thousand, four hundred ninety-seven".