1890187913 has 8 divisors (see below), whose sum is σ = 1899832800. Its totient is φ = 1880555040.

The previous prime is 1890187903. The next prime is 1890187921. The reversal of 1890187913 is 3197810981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1890187913 - 2⁸ = 1890187657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1890187903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 618413 + ... + 621461.

It is an arithmetic number, because the mean of its divisors is an integer number (237479100).

Almost surely, 2^1890187913 is an apocalyptic number.

It is an amenable number.

1890187913 is a deficient number, since it is larger than the sum of its proper divisors (9644887).

1890187913 is a wasteful number, since it uses less digits than its factorization.

1890187913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007.

The product of its (nonzero) digits is 108864, while the sum is 47.

The square root of 1890187913 is about 43476.2913896758. The cubic root of 1890187913 is about 1236.4265644092.

The spelling of 1890187913 in words is "one billion, eight hundred ninety million, one hundred eighty-seven thousand, nine hundred thirteen".