25776493 has 2 divisors, whose sum is σ = 25776494. Its totient is φ = 25776492.

The previous prime is 25776473. The next prime is 25776503. The reversal of 25776493 is 39467752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13853284 + 11923209 = 3722^2 + 3453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25776493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25776433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12888246 + 12888247.

It is an arithmetic number, because the mean of its divisors is an integer number (12888247).

Almost surely, 2^25776493 is an apocalyptic number.

It is an amenable number.

25776493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25776493 is an equidigital number, since it uses as much as digits as its factorization.

25776493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 43.

The square root of 25776493 is about 5077.0555443091. The cubic root of 25776493 is about 295.3982670157.

The spelling of 25776493 in words is "twenty-five million, seven hundred seventy-six thousand, four hundred ninety-three".