1925642489 has 2 divisors, whose sum is σ = 1925642490. Its totient is φ = 1925642488.

The previous prime is 1925642473. The next prime is 1925642503. The reversal of 1925642489 is 9842465291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1906806889 + 18835600 = 43667^2 + 4340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1925642489 - 2⁴ = 1925642473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1925642429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962821244 + 962821245.

It is an arithmetic number, because the mean of its divisors is an integer number (962821245).

Almost surely, 2^1925642489 is an apocalyptic number.

It is an amenable number.

1925642489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925642489 is an equidigital number, since it uses as much as digits as its factorization.

1925642489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 50.

The square root of 1925642489 is about 43882.1431678080. The cubic root of 1925642489 is about 1244.1093481024.

The spelling of 1925642489 in words is "one billion, nine hundred twenty-five million, six hundred forty-two thousand, four hundred eighty-nine".