1191880341 has 6 divisors (see below), whose sum is σ = 1721604950. Its totient is φ = 794586888.

The previous prime is 1191880331. The next prime is 1191880411. The reversal of 1191880341 is 1430881911.

It can be written as a sum of positive squares in only one way, i.e., 632321316 + 559559025 = 25146^2 + 23655^2 .

It is not a de Polignac number, because 1191880341 - 2²² = 1187686037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1191880296 and 1191880305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1191880331) 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, 66215566 + ... + 66215583.

Almost surely, 2^1191880341 is an apocalyptic number.

It is an amenable number.

1191880341 is a deficient number, since it is larger than the sum of its proper divisors (529724609).

1191880341 is a wasteful number, since it uses less digits than its factorization.

1191880341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132431155 (or 132431152 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 1191880341 is about 34523.6200448331. The cubic root of 1191880341 is about 1060.2563581331.

The spelling of 1191880341 in words is "one billion, one hundred ninety-one million, eight hundred eighty thousand, three hundred forty-one".