25870189 has 2 divisors, whose sum is σ = 25870190. Its totient is φ = 25870188.

The previous prime is 25870183. The next prime is 25870249. The reversal of 25870189 is 98107852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 5484964 = 4515^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 25870189 - 2³ = 25870181 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 (25870181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935094 + 12935095.

It is an arithmetic number, because the mean of its divisors is an integer number (12935095).

Almost surely, 2^25870189 is an apocalyptic number.

It is an amenable number.

25870189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25870189 is an equidigital number, since it uses as much as digits as its factorization.

25870189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 25870189 is about 5086.2745698596. The cubic root of 25870189 is about 295.7557525235.

The spelling of 25870189 in words is "twenty-five million, eight hundred seventy thousand, one hundred eighty-nine".