196986861 has 6 divisors (see below), whose sum is σ = 284536590. Its totient is φ = 131324568.

The previous prime is 196986859. The next prime is 196986869. The reversal of 196986861 is 168689691.

It can be written as a sum of positive squares in only one way, i.e., 158608836 + 38378025 = 12594^2 + 6195^2 .

It is not a de Polignac number, because 196986861 - 2¹ = 196986859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196986798 and 196986807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196986869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10943706 + ... + 10943723.

It is an arithmetic number, because the mean of its divisors is an integer number (47422765).

Almost surely, 2^196986861 is an apocalyptic number.

It is an amenable number.

196986861 is a deficient number, since it is larger than the sum of its proper divisors (87549729).

196986861 is a wasteful number, since it uses less digits than its factorization.

196986861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21887435 (or 21887432 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 196986861 is about 14035.2007823187. The cubic root of 196986861 is about 581.8518505544.

The spelling of 196986861 in words is "one hundred ninety-six million, nine hundred eighty-six thousand, eight hundred sixty-one".