25311389 has 2 divisors, whose sum is σ = 25311390. Its totient is φ = 25311388.

The previous prime is 25311379. The next prime is 25311397. The reversal of 25311389 is 98311352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 9351364 = 3995^2 + 3058^2 .

It is a cyclic number.

It is not a de Polignac number, because 25311389 - 2⁴ = 25311373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25311329) 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, 12655694 + 12655695.

It is an arithmetic number, because the mean of its divisors is an integer number (12655695).

Almost surely, 2^25311389 is an apocalyptic number.

It is an amenable number.

25311389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25311389 is an equidigital number, since it uses as much as digits as its factorization.

25311389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 25311389 is about 5031.0425360953. The cubic root of 25311389 is about 293.6107773034.

The spelling of 25311389 in words is "twenty-five million, three hundred eleven thousand, three hundred eighty-nine".