25309087 has 2 divisors, whose sum is σ = 25309088. Its totient is φ = 25309086.

The previous prime is 25309079. The next prime is 25309091. The reversal of 25309087 is 78090352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25309087 - 2³ = 25309079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25303087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12654543 + 12654544.

It is an arithmetic number, because the mean of its divisors is an integer number (12654544).

Almost surely, 2^25309087 is an apocalyptic number.

25309087 is a deficient number, since it is larger than the sum of its proper divisors (1).

25309087 is an equidigital number, since it uses as much as digits as its factorization.

25309087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 25309087 is about 5030.8137512732. The cubic root of 25309087 is about 293.6018760073.

The spelling of 25309087 in words is "twenty-five million, three hundred nine thousand, eighty-seven".