25951993 has 2 divisors, whose sum is σ = 25951994. Its totient is φ = 25951992.

The previous prime is 25951987. The next prime is 25951999. The reversal of 25951993 is 39915952.

It is a balanced prime because it is at equal distance from previous prime (25951987) and next prime (25951999).

It can be written as a sum of positive squares in only one way, i.e., 23843689 + 2108304 = 4883^2 + 1452^2 .

It is a cyclic number.

It is not a de Polignac number, because 25951993 - 2⁹ = 25951481 is a prime.

It is a super-3 number, since 3×25951993³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (25951999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12975996 + 12975997.

It is an arithmetic number, because the mean of its divisors is an integer number (12975997).

Almost surely, 2^25951993 is an apocalyptic number.

It is an amenable number.

25951993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25951993 is an equidigital number, since it uses as much as digits as its factorization.

25951993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109350, while the sum is 43.

The square root of 25951993 is about 5094.3098649375. The cubic root of 25951993 is about 296.0671604667.

The spelling of 25951993 in words is "twenty-five million, nine hundred fifty-one thousand, nine hundred ninety-three".