25956993 has 16 divisors (see below), whose sum is σ = 35582976. Its totient is φ = 16821840.

The previous prime is 25956989. The next prime is 25957027. The reversal of 25956993 is 39965952.

It is not a de Polignac number, because 25956993 - 2² = 25956989 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25956923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39796 + ... + 40442.

It is an arithmetic number, because the mean of its divisors is an integer number (2223936).

Almost surely, 2^25956993 is an apocalyptic number.

It is an amenable number.

25956993 is a deficient number, since it is larger than the sum of its proper divisors (9625983).

25956993 is a wasteful number, since it uses less digits than its factorization.

25956993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004.

The product of its digits is 656100, while the sum is 48.

The square root of 25956993 is about 5094.8005849101. The cubic root of 25956993 is about 296.0861730173.

The spelling of 25956993 in words is "twenty-five million, nine hundred fifty-six thousand, nine hundred ninety-three".