2013791897 has 4 divisors (see below), whose sum is σ = 2168698980. Its totient is φ = 1858884816.

The previous prime is 2013791873. The next prime is 2013791909. The reversal of 2013791897 is 7981973102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7981973102 = 2 ⋅3990986551.

It can be written as a sum of positive squares in 2 ways, for example, as 1169366416 + 844425481 = 34196^2 + 29059^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013791897 - 2⁸ = 2013791641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2013793897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77453522 + ... + 77453547.

It is an arithmetic number, because the mean of its divisors is an integer number (542174745).

Almost surely, 2^2013791897 is an apocalyptic number.

It is an amenable number.

2013791897 is a deficient number, since it is larger than the sum of its proper divisors (154907083).

2013791897 is a wasteful number, since it uses less digits than its factorization.

2013791897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154907082.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 2013791897 is about 44875.2927232793. The cubic root of 2013791897 is about 1262.8105350161.

The spelling of 2013791897 in words is "two billion, thirteen million, seven hundred ninety-one thousand, eight hundred ninety-seven".