25949743 has 2 divisors, whose sum is σ = 25949744. Its totient is φ = 25949742.

The previous prime is 25949723. The next prime is 25949767. The reversal of 25949743 is 34794952.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25949743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25949743.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25949713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12974871 + 12974872.

It is an arithmetic number, because the mean of its divisors is an integer number (12974872).

Almost surely, 2^25949743 is an apocalyptic number.

25949743 is a deficient number, since it is larger than the sum of its proper divisors (1).

25949743 is an equidigital number, since it uses as much as digits as its factorization.

25949743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 25949743 is about 5094.0890255275. The cubic root of 25949743 is about 296.0586040222.

The spelling of 25949743 in words is "twenty-five million, nine hundred forty-nine thousand, seven hundred forty-three".