25457893 has 2 divisors, whose sum is σ = 25457894. Its totient is φ = 25457892.

The previous prime is 25457869. The next prime is 25457897. The reversal of 25457893 is 39875452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16499844 + 8958049 = 4062^2 + 2993^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25457893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25457897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728946 + 12728947.

It is an arithmetic number, because the mean of its divisors is an integer number (12728947).

Almost surely, 2^25457893 is an apocalyptic number.

It is an amenable number.

25457893 is a deficient number, since it is larger than the sum of its proper divisors (1).

25457893 is an equidigital number, since it uses as much as digits as its factorization.

25457893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 25457893 is about 5045.5815323905. The cubic root of 25457893 is about 294.1761674214.

It can be divided in two parts, 2545789 and 3, that multiplied together give a palindrome (7637367).

The spelling of 25457893 in words is "twenty-five million, four hundred fifty-seven thousand, eight hundred ninety-three".