1191876061 has 16 divisors (see below), whose sum is σ = 1266163200. Its totient is φ = 1118795328.

The previous prime is 1191876047. The next prime is 1191876083. The reversal of 1191876061 is 1606781911.

It is a cyclic number.

It is not a de Polignac number, because 1191876061 - 2⁵ = 1191876029 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 (1191870061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1574095 + ... + 1574851.

It is an arithmetic number, because the mean of its divisors is an integer number (79135200).

Almost surely, 2^1191876061 is an apocalyptic number.

It is an amenable number.

1191876061 is a deficient number, since it is larger than the sum of its proper divisors (74287139).

1191876061 is a wasteful number, since it uses less digits than its factorization.

1191876061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1191876061 is about 34523.5580582303. The cubic root of 1191876061 is about 1060.2550890173.

The spelling of 1191876061 in words is "one billion, one hundred ninety-one million, eight hundred seventy-six thousand, sixty-one".