25724893 has 4 divisors (see below), whose sum is σ = 27238140. Its totient is φ = 24211648.

The previous prime is 25724891. The next prime is 25724903. The reversal of 25724893 is 39842752.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13704804 + 12020089 = 3702^2 + 3467^2 .

It is a cyclic number.

It is not a de Polignac number, because 25724893 - 2¹ = 25724891 is a prime.

It is a super-2 number, since 2×25724893² = 1323540239722898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25724891) 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, 756598 + ... + 756631.

It is an arithmetic number, because the mean of its divisors is an integer number (6809535).

Almost surely, 2^25724893 is an apocalyptic number.

It is an amenable number.

25724893 is a deficient number, since it is larger than the sum of its proper divisors (1513247).

25724893 is a wasteful number, since it uses less digits than its factorization.

25724893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513246.

The product of its digits is 120960, while the sum is 40.

The square root of 25724893 is about 5071.9713130104. The cubic root of 25724893 is about 295.2010235703.

The spelling of 25724893 in words is "twenty-five million, seven hundred twenty-four thousand, eight hundred ninety-three".