25993777 has 2 divisors, whose sum is σ = 25993778. Its totient is φ = 25993776.

The previous prime is 25993753. The next prime is 25993783. The reversal of 25993777 is 77739952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20466576 + 5527201 = 4524^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 25993777 - 2¹⁹ = 25469489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25993777.

It is not a weakly prime, because it can be changed into another prime (25993727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12996888 + 12996889.

It is an arithmetic number, because the mean of its divisors is an integer number (12996889).

Almost surely, 2^25993777 is an apocalyptic number.

It is an amenable number.

25993777 is a deficient number, since it is larger than the sum of its proper divisors (1).

25993777 is an equidigital number, since it uses as much as digits as its factorization.

25993777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 833490, while the sum is 49.

The square root of 25993777 is about 5098.4092617208. The cubic root of 25993777 is about 296.2259695535.

The spelling of 25993777 in words is "twenty-five million, nine hundred ninety-three thousand, seven hundred seventy-seven".