25979149 has 4 divisors (see below), whose sum is σ = 29690464. Its totient is φ = 22267836.

The previous prime is 25979141. The next prime is 25979159. The reversal of 25979149 is 94197952.

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 not a de Polignac number, because 25979149 - 2³ = 25979141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25979099 and 25979108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25979141) 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, 1855647 + ... + 1855660.

It is an arithmetic number, because the mean of its divisors is an integer number (7422616).

Almost surely, 2^25979149 is an apocalyptic number.

It is an amenable number.

25979149 is a deficient number, since it is larger than the sum of its proper divisors (3711315).

25979149 is an equidigital number, since it uses as much as digits as its factorization.

25979149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3711314.

The product of its digits is 204120, while the sum is 46.

The square root of 25979149 is about 5096.9744947370. The cubic root of 25979149 is about 296.1703920644.

The spelling of 25979149 in words is "twenty-five million, nine hundred seventy-nine thousand, one hundred forty-nine".