25658993 has 2 divisors, whose sum is σ = 25658994. Its totient is φ = 25658992.

The previous prime is 25658957. The next prime is 25659031. The reversal of 25658993 is 39985652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21464689 + 4194304 = 4633^2 + 2048^2 .

It is a cyclic number.

It is not a de Polignac number, because 25658993 - 2⁶ = 25658929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25658093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12829496 + 12829497.

It is an arithmetic number, because the mean of its divisors is an integer number (12829497).

Almost surely, 2^25658993 is an apocalyptic number.

It is an amenable number.

25658993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25658993 is an equidigital number, since it uses as much as digits as its factorization.

25658993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The square root of 25658993 is about 5065.4706592774. The cubic root of 25658993 is about 294.9487337897.

The spelling of 25658993 in words is "twenty-five million, six hundred fifty-eight thousand, nine hundred ninety-three".