25138797 has 4 divisors (see below), whose sum is σ = 33518400. Its totient is φ = 16759196.

The previous prime is 25138783. The next prime is 25138807. The reversal of 25138797 is 79783152.

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 25138797 - 2¹⁰ = 25137773 is a prime.

It is a super-2 number, since 2×25138797² = 1263918229214418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25138727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4189797 + ... + 4189802.

It is an arithmetic number, because the mean of its divisors is an integer number (8379600).

Almost surely, 2^25138797 is an apocalyptic number.

It is an amenable number.

25138797 is a deficient number, since it is larger than the sum of its proper divisors (8379603).

25138797 is an equidigital number, since it uses as much as digits as its factorization.

25138797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8379602.

The product of its digits is 105840, while the sum is 42.

The square root of 25138797 is about 5013.8604886853. The cubic root of 25138797 is about 292.9419019955.

The spelling of 25138797 in words is "twenty-five million, one hundred thirty-eight thousand, seven hundred ninety-seven".