25778473 has 4 divisors (see below), whose sum is σ = 29461120. Its totient is φ = 22095828.

The previous prime is 25778461. The next prime is 25778491. The reversal of 25778473 is 37487752.

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 a de Polignac number, because none of the positive numbers 2^k-25778473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25778413) 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, 1841313 + ... + 1841326.

It is an arithmetic number, because the mean of its divisors is an integer number (7365280).

Almost surely, 2^25778473 is an apocalyptic number.

It is an amenable number.

25778473 is a deficient number, since it is larger than the sum of its proper divisors (3682647).

25778473 is an equidigital number, since it uses as much as digits as its factorization.

25778473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682646.

The product of its digits is 329280, while the sum is 43.

The square root of 25778473 is about 5077.2505354769. The cubic root of 25778473 is about 295.4058304133.

The spelling of 25778473 in words is "twenty-five million, seven hundred seventy-eight thousand, four hundred seventy-three".