25436987 has 2 divisors, whose sum is σ = 25436988. Its totient is φ = 25436986.

The previous prime is 25436959. The next prime is 25436993. The reversal of 25436987 is 78963452.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25436987 - 2⁸ = 25436731 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (25436287) 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, 12718493 + 12718494.

It is an arithmetic number, because the mean of its divisors is an integer number (12718494).

Almost surely, 2^25436987 is an apocalyptic number.

25436987 is a deficient number, since it is larger than the sum of its proper divisors (1).

25436987 is an equidigital number, since it uses as much as digits as its factorization.

25436987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 25436987 is about 5043.5093932697. The cubic root of 25436987 is about 294.0956196296.

The spelling of 25436987 in words is "twenty-five million, four hundred thirty-six thousand, nine hundred eighty-seven".