1933045987 has 4 divisors (see below), whose sum is σ = 1946019600. Its totient is φ = 1920072376.

The previous prime is 1933045957. The next prime is 1933045991. The reversal of 1933045987 is 7895403391.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1933045987 - 2⁷ = 1933045859 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 1933045987.

It is not an unprimeable number, because it can be changed into a prime (1933045957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6486583 + ... + 6486880.

It is an arithmetic number, because the mean of its divisors is an integer number (486504900).

Almost surely, 2^1933045987 is an apocalyptic number.

1933045987 is a deficient number, since it is larger than the sum of its proper divisors (12973613).

1933045987 is a wasteful number, since it uses less digits than its factorization.

1933045987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12973612.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 1933045987 is about 43966.4188557585. The cubic root of 1933045987 is about 1245.7017139576.

The spelling of 1933045987 in words is "one billion, nine hundred thirty-three million, forty-five thousand, nine hundred eighty-seven".