25778293 has 2 divisors, whose sum is σ = 25778294. Its totient is φ = 25778292.

The previous prime is 25778281. The next prime is 25778309. The reversal of 25778293 is 39287752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25623844 + 154449 = 5062^2 + 393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25778293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25778393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12889146 + 12889147.

It is an arithmetic number, because the mean of its divisors is an integer number (12889147).

Almost surely, 2^25778293 is an apocalyptic number.

It is an amenable number.

25778293 is a deficient number, since it is larger than the sum of its proper divisors (1).

25778293 is an equidigital number, since it uses as much as digits as its factorization.

25778293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 25778293 is about 5077.2328093165. The cubic root of 25778293 is about 295.4051428477.

The spelling of 25778293 in words is "twenty-five million, seven hundred seventy-eight thousand, two hundred ninety-three".