1187341191 has 6 divisors (see below), whose sum is σ = 1715048400. Its totient is φ = 791560788.

The previous prime is 1187341159. The next prime is 1187341219. The reversal of 1187341191 is 1911437811.

It is not a de Polignac number, because 1187341191 - 2⁵ = 1187341159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187341291) 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, 65963391 + ... + 65963408.

It is an arithmetic number, because the mean of its divisors is an integer number (285841400).

Almost surely, 2^1187341191 is an apocalyptic number.

1187341191 is a deficient number, since it is larger than the sum of its proper divisors (527707209).

1187341191 is a wasteful number, since it uses less digits than its factorization.

1187341191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131926805 (or 131926802 counting only the distinct ones).

The product of its digits is 6048, while the sum is 36.

The square root of 1187341191 is about 34457.8175600255. The cubic root of 1187341191 is about 1058.9086878604.

It can be divided in two parts, 1187 and 341191, that added together give a triangular number (342378 = T₈₂₇).

The spelling of 1187341191 in words is "one billion, one hundred eighty-seven million, three hundred forty-one thousand, one hundred ninety-one".