25496813 has 2 divisors, whose sum is σ = 25496814. Its totient is φ = 25496812.

The previous prime is 25496797. The next prime is 25496819. The reversal of 25496813 is 31869452.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23639044 + 1857769 = 4862^2 + 1363^2 .

It is a cyclic number.

It is not a de Polignac number, because 25496813 - 2⁴ = 25496797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25496819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12748406 + 12748407.

It is an arithmetic number, because the mean of its divisors is an integer number (12748407).

Almost surely, 2^25496813 is an apocalyptic number.

It is an amenable number.

25496813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25496813 is an equidigital number, since it uses as much as digits as its factorization.

25496813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 25496813 is about 5049.4368992988. The cubic root of 25496813 is about 294.3260031627.

The spelling of 25496813 in words is "twenty-five million, four hundred ninety-six thousand, eight hundred thirteen".