25378779 has 4 divisors (see below), whose sum is σ = 33838376. Its totient is φ = 16919184.

The previous prime is 25378777. The next prime is 25378817. The reversal of 25378779 is 97787352.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25378779 - 2¹ = 25378777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25378777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4229794 + ... + 4229799.

It is an arithmetic number, because the mean of its divisors is an integer number (8459594).

Almost surely, 2^25378779 is an apocalyptic number.

25378779 is a deficient number, since it is larger than the sum of its proper divisors (8459597).

25378779 is an equidigital number, since it uses as much as digits as its factorization.

25378779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8459596.

The product of its digits is 740880, while the sum is 48.

The square root of 25378779 is about 5037.7355031800. The cubic root of 25378779 is about 293.8711198731.

The spelling of 25378779 in words is "twenty-five million, three hundred seventy-eight thousand, seven hundred seventy-nine".