25782739 has 4 divisors (see below), whose sum is σ = 26167624. Its totient is φ = 25397856.

The previous prime is 25782737. The next prime is 25782763. The reversal of 25782739 is 93728752.

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

It is a cyclic number.

It is not a de Polignac number, because 25782739 - 2¹ = 25782737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25782695 and 25782704.

It is not an unprimeable number, because it can be changed into a prime (25782733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192342 + ... + 192475.

It is an arithmetic number, because the mean of its divisors is an integer number (6541906).

Almost surely, 2^25782739 is an apocalyptic number.

25782739 is a deficient number, since it is larger than the sum of its proper divisors (384885).

25782739 is an equidigital number, since it uses as much as digits as its factorization.

25782739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384884.

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

The square root of 25782739 is about 5077.6706273645. The cubic root of 25782739 is about 295.4221247811.

The spelling of 25782739 in words is "twenty-five million, seven hundred eighty-two thousand, seven hundred thirty-nine".