25713643 has 2 divisors, whose sum is σ = 25713644. Its totient is φ = 25713642.

The previous prime is 25713637. The next prime is 25713659. The reversal of 25713643 is 34631752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25713643 - 2⁹ = 25713131 is a prime.

It is a super-2 number, since 2×25713643² = 1322382872662898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25713943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12856821 + 12856822.

It is an arithmetic number, because the mean of its divisors is an integer number (12856822).

Almost surely, 2^25713643 is an apocalyptic number.

25713643 is a deficient number, since it is larger than the sum of its proper divisors (1).

25713643 is an equidigital number, since it uses as much as digits as its factorization.

25713643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 25713643 is about 5070.8621554919. The cubic root of 25713643 is about 295.1579848976.

The spelling of 25713643 in words is "twenty-five million, seven hundred thirteen thousand, six hundred forty-three".