25522979 has 2 divisors, whose sum is σ = 25522980. Its totient is φ = 25522978.

The previous prime is 25522969. The next prime is 25523011. The reversal of 25522979 is 97922552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25522979 is a prime.

It is equal to p_1596497 and since 25522979 and 1596497 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25522919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12761489 + 12761490.

It is an arithmetic number, because the mean of its divisors is an integer number (12761490).

Almost surely, 2^25522979 is an apocalyptic number.

25522979 is a deficient number, since it is larger than the sum of its proper divisors (1).

25522979 is an equidigital number, since it uses as much as digits as its factorization.

25522979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 25522979 is about 5052.0272168705. The cubic root of 25522979 is about 294.4266523590.

The spelling of 25522979 in words is "twenty-five million, five hundred twenty-two thousand, nine hundred seventy-nine".