25707997 has 12 divisors (see below), whose sum is σ = 31206816. Its totient is φ = 21076440.

The previous prime is 25707991. The next prime is 25708009. The reversal of 25707997 is 79970752.

It is a happy number.

It is not a de Polignac number, because 25707997 - 2¹⁵ = 25675229 is a prime.

It is a super-2 number, since 2×25707997² = 1321802219504018, 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 (25707991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10279 + ... + 12532.

It is an arithmetic number, because the mean of its divisors is an integer number (2600568).

Almost surely, 2^25707997 is an apocalyptic number.

It is an amenable number.

25707997 is a deficient number, since it is larger than the sum of its proper divisors (5498819).

25707997 is a wasteful number, since it uses less digits than its factorization.

25707997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22848 (or 22841 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 46.

The square root of 25707997 is about 5070.3054148641. The cubic root of 25707997 is about 295.1363804914.

The spelling of 25707997 in words is "twenty-five million, seven hundred seven thousand, nine hundred ninety-seven".