25319993 has 4 divisors (see below), whose sum is σ = 25570788. Its totient is φ = 25069200.

The previous prime is 25319971. The next prime is 25320011. The reversal of 25319993 is 39991352.

It is a happy number.

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 19598329 + 5721664 = 4427^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 25319993 - 2¹⁴ = 25303609 is a prime.

It is a super-2 number, since 2×25319993² = 1282204091040098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25319993.

It is not an unprimeable number, because it can be changed into a prime (25319933) 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, 125246 + ... + 125447.

It is an arithmetic number, because the mean of its divisors is an integer number (6392697).

Almost surely, 2^25319993 is an apocalyptic number.

It is an amenable number.

25319993 is a deficient number, since it is larger than the sum of its proper divisors (250795).

25319993 is a wasteful number, since it uses less digits than its factorization.

25319993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250794.

The product of its digits is 65610, while the sum is 41.

The square root of 25319993 is about 5031.8975546010. The cubic root of 25319993 is about 293.6440421832.

The spelling of 25319993 in words is "twenty-five million, three hundred nineteen thousand, nine hundred ninety-three".