1919890325 has 24 divisors (see below), whose sum is σ = 2526568200. Its totient is φ = 1442201600.

The previous prime is 1919890309. The next prime is 1919890327. The reversal of 1919890325 is 5230989191.

It can be written as a sum of positive squares in 12 ways, for example, as 161849284 + 1758041041 = 12722^2 + 41929^2 .

It is not a de Polignac number, because 1919890325 - 2⁴ = 1919890309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1919890325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919890327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185795 + ... + 195855.

It is an arithmetic number, because the mean of its divisors is an integer number (105273675).

Almost surely, 2^1919890325 is an apocalyptic number.

It is an amenable number.

1919890325 is a deficient number, since it is larger than the sum of its proper divisors (606677875).

1919890325 is a wasteful number, since it uses less digits than its factorization.

1919890325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10537 (or 10532 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 1919890325 is about 43816.5530935513. The cubic root of 1919890325 is about 1242.8693362556.

The spelling of 1919890325 in words is "one billion, nine hundred nineteen million, eight hundred ninety thousand, three hundred twenty-five".