25989091 has 2 divisors, whose sum is σ = 25989092. Its totient is φ = 25989090.

The previous prime is 25989079. The next prime is 25989097. The reversal of 25989091 is 19098952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25989091 - 2²¹ = 23891939 is a prime.

It is not a weakly prime, because it can be changed into another prime (25989097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12994545 + 12994546.

It is an arithmetic number, because the mean of its divisors is an integer number (12994546).

Almost surely, 2^25989091 is an apocalyptic number.

25989091 is a deficient number, since it is larger than the sum of its proper divisors (1).

25989091 is an equidigital number, since it uses as much as digits as its factorization.

25989091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 25989091 is about 5097.9496859031. The cubic root of 25989091 is about 296.2081678784.

The spelling of 25989091 in words is "twenty-five million, nine hundred eighty-nine thousand, ninety-one".