25993489 has 2 divisors, whose sum is σ = 25993490. Its totient is φ = 25993488.

The previous prime is 25993441. The next prime is 25993511. The reversal of 25993489 is 98439952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25928464 + 65025 = 5092^2 + 255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25993489 is a prime.

It is a super-2 number, since 2×25993489² = 1351322940786242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25993589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12996744 + 12996745.

It is an arithmetic number, because the mean of its divisors is an integer number (12996745).

Almost surely, 2^25993489 is an apocalyptic number.

It is an amenable number.

25993489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25993489 is an equidigital number, since it uses as much as digits as its factorization.

25993489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 49.

The square root of 25993489 is about 5098.3810175388. The cubic root of 25993489 is about 296.2248755302.

The spelling of 25993489 in words is "twenty-five million, nine hundred ninety-three thousand, four hundred eighty-nine".