861929083 has 4 divisors (see below), whose sum is σ = 869556888. Its totient is φ = 854301280.

The previous prime is 861929069. The next prime is 861929113. The reversal of 861929083 is 380929168.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-861929083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861929063) 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, 3813733 + ... + 3813958.

It is an arithmetic number, because the mean of its divisors is an integer number (217389222).

Almost surely, 2^861929083 is an apocalyptic number.

861929083 is a deficient number, since it is larger than the sum of its proper divisors (7627805).

861929083 is a wasteful number, since it uses less digits than its factorization.

861929083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7627804.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 861929083 is about 29358.6287656627. The cubic root of 861929083 is about 951.6790557584.

The spelling of 861929083 in words is "eight hundred sixty-one million, nine hundred twenty-nine thousand, eighty-three".