25051993 has 4 divisors (see below), whose sum is σ = 25141428. Its totient is φ = 24962560.

The previous prime is 25051981. The next prime is 25052003. The reversal of 25051993 is 39915052.

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 11235904 + 13816089 = 3352^2 + 3717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25051993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25001993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44296 + ... + 44857.

It is an arithmetic number, because the mean of its divisors is an integer number (6285357).

Almost surely, 2^25051993 is an apocalyptic number.

It is an amenable number.

25051993 is a deficient number, since it is larger than the sum of its proper divisors (89435).

25051993 is an equidigital number, since it uses as much as digits as its factorization.

25051993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89434.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 25051993 is about 5005.1965995353. The cubic root of 25051993 is about 292.6043380662.

The spelling of 25051993 in words is "twenty-five million, fifty-one thousand, nine hundred ninety-three".