1901982113 has 2 divisors, whose sum is σ = 1901982114. Its totient is φ = 1901982112.

The previous prime is 1901982109. The next prime is 1901982127. The reversal of 1901982113 is 3112891091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1439215969 + 462766144 = 37937^2 + 21512^2 .

It is an emirp because it is prime and its reverse (3112891091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1901982113 - 2² = 1901982109 is a prime.

It is not a weakly prime, because it can be changed into another prime (1901982133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950991056 + 950991057.

It is an arithmetic number, because the mean of its divisors is an integer number (950991057).

Almost surely, 2^1901982113 is an apocalyptic number.

It is an amenable number.

1901982113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901982113 is an equidigital number, since it uses as much as digits as its factorization.

1901982113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 1901982113 is about 43611.7199041725. The cubic root of 1901982113 is about 1238.9928765249.

The spelling of 1901982113 in words is "one billion, nine hundred one million, nine hundred eighty-two thousand, one hundred thirteen".