25630837 has 2 divisors, whose sum is σ = 25630838. Its totient is φ = 25630836.

The previous prime is 25630823. The next prime is 25630859. The reversal of 25630837 is 73803652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22193521 + 3437316 = 4711^2 + 1854^2 .

It is a cyclic number.

It is not a de Polignac number, because 25630837 - 2¹¹ = 25628789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25630807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815418 + 12815419.

It is an arithmetic number, because the mean of its divisors is an integer number (12815419).

Almost surely, 2^25630837 is an apocalyptic number.

It is an amenable number.

25630837 is a deficient number, since it is larger than the sum of its proper divisors (1).

25630837 is an equidigital number, since it uses as much as digits as its factorization.

25630837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 25630837 is about 5062.6906877667. The cubic root of 25630837 is about 294.8408104068.

The spelling of 25630837 in words is "twenty-five million, six hundred thirty thousand, eight hundred thirty-seven".