25854993 has 6 divisors (see below), whose sum is σ = 37346114. Its totient is φ = 17236656.

The previous prime is 25854989. The next prime is 25855003. The reversal of 25854993 is 39945852.

It can be written as a sum of positive squares in only one way, i.e., 18948609 + 6906384 = 4353^2 + 2628^2 .

It is not a de Polignac number, because 25854993 - 2² = 25854989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25854923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1436380 + ... + 1436397.

Almost surely, 2^25854993 is an apocalyptic number.

It is an amenable number.

25854993 is a deficient number, since it is larger than the sum of its proper divisors (11491121).

25854993 is a wasteful number, since it uses less digits than its factorization.

25854993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872783 (or 2872780 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 25854993 is about 5084.7805262371. The cubic root of 25854993 is about 295.6978327730.

The spelling of 25854993 in words is "twenty-five million, eight hundred fifty-four thousand, nine hundred ninety-three".