25723013 has 2 divisors, whose sum is σ = 25723014. Its totient is φ = 25723012.

The previous prime is 25723007. The next prime is 25723043. The reversal of 25723013 is 31032752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23600164 + 2122849 = 4858^2 + 1457^2 .

It is a cyclic number.

It is not a de Polignac number, because 25723013 - 2¹⁰ = 25721989 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25723013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25723043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12861506 + 12861507.

It is an arithmetic number, because the mean of its divisors is an integer number (12861507).

Almost surely, 2^25723013 is an apocalyptic number.

It is an amenable number.

25723013 is a deficient number, since it is larger than the sum of its proper divisors (1).

25723013 is an equidigital number, since it uses as much as digits as its factorization.

25723013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 25723013 is about 5071.7859773457. The cubic root of 25723013 is about 295.1938322032.

Adding to 25723013 its reverse (31032752), we get a palindrome (56755765).

The spelling of 25723013 in words is "twenty-five million, seven hundred twenty-three thousand, thirteen".