1191061337 has 2 divisors, whose sum is σ = 1191061338. Its totient is φ = 1191061336.

The previous prime is 1191061331. The next prime is 1191061373. The reversal of 1191061337 is 7331601911.

It is a happy number.

Together with next prime (1191061373) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1038192841 + 152868496 = 32221^2 + 12364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1191061337 - 2³⁰ = 117319513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1191061331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595530668 + 595530669.

It is an arithmetic number, because the mean of its divisors is an integer number (595530669).

Almost surely, 2^1191061337 is an apocalyptic number.

It is an amenable number.

1191061337 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191061337 is an equidigital number, since it uses as much as digits as its factorization.

1191061337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 1191061337 is about 34511.7565041248. The cubic root of 1191061337 is about 1060.0134497522.

The spelling of 1191061337 in words is "one billion, one hundred ninety-one million, sixty-one thousand, three hundred thirty-seven".