7959861 has 24 divisors (see below), whose sum is σ = 14152320. Its totient is φ = 4198176.

The previous prime is 7959857. The next prime is 7959869. The reversal of 7959861 is 1689597.

It is not a de Polignac number, because 7959861 - 2² = 7959857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7959869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4041 + ... + 5678.

It is an arithmetic number, because the mean of its divisors is an integer number (589680).

Almost surely, 2^7959861 is an apocalyptic number.

It is an amenable number.

7959861 is a deficient number, since it is larger than the sum of its proper divisors (6192459).

7959861 is a wasteful number, since it uses less digits than its factorization.

7959861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9745 (or 9742 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 7959861 is about 2821.3225622038. The cubic root of 7959861 is about 199.6649473454.

The spelling of 7959861 in words is "seven million, nine hundred fifty-nine thousand, eight hundred sixty-one".