1985087113 has 4 divisors (see below), whose sum is σ = 1986812928. Its totient is φ = 1983361300.

The previous prime is 1985087101. The next prime is 1985087129. The reversal of 1985087113 is 3117805891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1985087113 - 2⁹ = 1985086601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1985087113.

It is not an unprimeable number, because it can be changed into a prime (1985081113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861181 + ... + 863482.

It is an arithmetic number, because the mean of its divisors is an integer number (496703232).

Almost surely, 2^1985087113 is an apocalyptic number.

It is an amenable number.

1985087113 is a deficient number, since it is larger than the sum of its proper divisors (1725815).

1985087113 is a wasteful number, since it uses less digits than its factorization.

1985087113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725814.

The product of its (nonzero) digits is 60480, while the sum is 43.

The square root of 1985087113 is about 44554.3164351110. The cubic root of 1985087113 is about 1256.7817241414.

The spelling of 1985087113 in words is "one billion, nine hundred eighty-five million, eighty-seven thousand, one hundred thirteen".