1187336791 has 2 divisors, whose sum is σ = 1187336792. Its totient is φ = 1187336790.

The previous prime is 1187336789. The next prime is 1187336849. The reversal of 1187336791 is 1976337811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1187336791 - 2¹ = 1187336789 is a prime.

Together with 1187336789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187336191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593668395 + 593668396.

It is an arithmetic number, because the mean of its divisors is an integer number (593668396).

Almost surely, 2^1187336791 is an apocalyptic number.

1187336791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187336791 is an equidigital number, since it uses as much as digits as its factorization.

1187336791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 1187336791 is about 34457.7537137870. The cubic root of 1187336791 is about 1058.9073798388.

The spelling of 1187336791 in words is "one billion, one hundred eighty-seven million, three hundred thirty-six thousand, seven hundred ninety-one".