25977899 has 2 divisors, whose sum is σ = 25977900. Its totient is φ = 25977898.

The previous prime is 25977893. The next prime is 25977901. The reversal of 25977899 is 99877952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25977899 - 2¹⁶ = 25912363 is a prime.

Together with 25977901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25977893) 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 as a sum of consecutive naturals, namely, 12988949 + 12988950.

It is an arithmetic number, because the mean of its divisors is an integer number (12988950).

Almost surely, 2^25977899 is an apocalyptic number.

25977899 is a deficient number, since it is larger than the sum of its proper divisors (1).

25977899 is an equidigital number, since it uses as much as digits as its factorization.

25977899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 56.

The square root of 25977899 is about 5096.8518714987. The cubic root of 25977899 is about 296.1656418584.

The spelling of 25977899 in words is "twenty-five million, nine hundred seventy-seven thousand, eight hundred ninety-nine".