861942872933 has 4 divisors (see below), whose sum is σ = 874807692000. Its totient is φ = 849078053868.

The previous prime is 861942872927. The next prime is 861942872969. The reversal of 861942872933 is 339278249168.

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 861942872933 - 2⁸ = 861942872677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861942872533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6432409433 + ... + 6432409566.

It is an arithmetic number, because the mean of its divisors is an integer number (218701923000).

Almost surely, 2^861942872933 is an apocalyptic number.

It is an amenable number.

861942872933 is a deficient number, since it is larger than the sum of its proper divisors (12864819067).

861942872933 is a wasteful number, since it uses less digits than its factorization.

861942872933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12864819066.

The product of its digits is 31352832, while the sum is 62.

The spelling of 861942872933 in words is "eight hundred sixty-one billion, nine hundred forty-two million, eight hundred seventy-two thousand, nine hundred thirty-three".