25630949 has 2 divisors, whose sum is σ = 25630950. Its totient is φ = 25630948.

The previous prime is 25630939. The next prime is 25630961. The reversal of 25630949 is 94903652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16957924 + 8673025 = 4118^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 25630949 - 2¹⁶ = 25565413 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25630939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12815474 + 12815475.

It is an arithmetic number, because the mean of its divisors is an integer number (12815475).

Almost surely, 2^25630949 is an apocalyptic number.

It is an amenable number.

25630949 is a deficient number, since it is larger than the sum of its proper divisors (1).

25630949 is an equidigital number, since it uses as much as digits as its factorization.

25630949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 25630949 is about 5062.7017490664. The cubic root of 25630949 is about 294.8412398651.

The spelling of 25630949 in words is "twenty-five million, six hundred thirty thousand, nine hundred forty-nine".