25307993 has 4 divisors (see below), whose sum is σ = 25321488. Its totient is φ = 25294500.

The previous prime is 25307987. The next prime is 25308011. The reversal of 25307993 is 39970352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25307993 - 2¹² = 25303897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25307903) 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, 3371 + ... + 7872.

It is an arithmetic number, because the mean of its divisors is an integer number (6330372).

Almost surely, 2^25307993 is an apocalyptic number.

It is an amenable number.

25307993 is a deficient number, since it is larger than the sum of its proper divisors (13495).

25307993 is a wasteful number, since it uses less digits than its factorization.

25307993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13494.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 25307993 is about 5030.7050201736. The cubic root of 25307993 is about 293.5976455758.

The spelling of 25307993 in words is "twenty-five million, three hundred seven thousand, nine hundred ninety-three".