1191741139 has 4 divisors (see below), whose sum is σ = 1192393840. Its totient is φ = 1191088440.

The previous prime is 1191741107. The next prime is 1191741143. The reversal of 1191741139 is 9311471911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1191741139 - 2⁵ = 1191741107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1191741098 and 1191741107.

It is not an unprimeable number, because it can be changed into a prime (1191741179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323604 + ... + 327265.

It is an arithmetic number, because the mean of its divisors is an integer number (298098460).

Almost surely, 2^1191741139 is an apocalyptic number.

1191741139 is a deficient number, since it is larger than the sum of its proper divisors (652701).

1191741139 is an equidigital number, since it uses as much as digits as its factorization.

1191741139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652700.

The product of its digits is 6804, while the sum is 37.

The square root of 1191741139 is about 34521.6039459351. The cubic root of 1191741139 is about 1060.2150800656.

The spelling of 1191741139 in words is "one billion, one hundred ninety-one million, seven hundred forty-one thousand, one hundred thirty-nine".