25778317 has 4 divisors (see below), whose sum is σ = 26163136. Its totient is φ = 25393500.

The previous prime is 25778309. The next prime is 25778321. The reversal of 25778317 is 71387752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25778317 - 2³ = 25778309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25778317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25778387) 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 in 3 ways as a sum of consecutive naturals, for example, 192309 + ... + 192442.

It is an arithmetic number, because the mean of its divisors is an integer number (6540784).

Almost surely, 2^25778317 is an apocalyptic number.

It is an amenable number.

25778317 is a deficient number, since it is larger than the sum of its proper divisors (384819).

25778317 is an equidigital number, since it uses as much as digits as its factorization.

25778317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384818.

The product of its digits is 82320, while the sum is 40.

The square root of 25778317 is about 5077.2351728081. The cubic root of 25778317 is about 295.4052345233.

The spelling of 25778317 in words is "twenty-five million, seven hundred seventy-eight thousand, three hundred seventeen".