25583989 has 2 divisors, whose sum is σ = 25583990. Its totient is φ = 25583988.

The previous prime is 25583977. The next prime is 25584019. The reversal of 25583989 is 98938552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25583364 + 625 = 5058^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 25583989 - 2¹⁹ = 25059701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25583939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12791994 + 12791995.

It is an arithmetic number, because the mean of its divisors is an integer number (12791995).

Almost surely, 2^25583989 is an apocalyptic number.

It is an amenable number.

25583989 is a deficient number, since it is larger than the sum of its proper divisors (1).

25583989 is an equidigital number, since it uses as much as digits as its factorization.

25583989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777600, while the sum is 49.

The square root of 25583989 is about 5058.0617829362. The cubic root of 25583989 is about 294.6610643396.

The spelling of 25583989 in words is "twenty-five million, five hundred eighty-three thousand, nine hundred eighty-nine".