861982725 has 24 divisors (see below), whose sum is σ = 1452040992. Its totient is φ = 451048000.

The previous prime is 861982721. The next prime is 861982733. The reversal of 861982725 is 527289168.

It is not a de Polignac number, because 861982725 - 2² = 861982721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861982721) 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 23 ways as a sum of consecutive naturals, for example, 104451 + ... + 112400.

It is an arithmetic number, because the mean of its divisors is an integer number (60501708).

Almost surely, 2^861982725 is an apocalyptic number.

It is an amenable number.

861982725 is a deficient number, since it is larger than the sum of its proper divisors (590058267).

861982725 is a wasteful number, since it uses less digits than its factorization.

861982725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216917 (or 216912 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 861982725 is about 29359.5423159149. The cubic root of 861982725 is about 951.6987978733.

The spelling of 861982725 in words is "eight hundred sixty-one million, nine hundred eighty-two thousand, seven hundred twenty-five".