1187331213 has 4 divisors (see below), whose sum is σ = 1583108288. Its totient is φ = 791554140.

The previous prime is 1187331209. The next prime is 1187331241. The reversal of 1187331213 is 3121337811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1187331213 - 2² = 1187331209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187331113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197888533 + ... + 197888538.

It is an arithmetic number, because the mean of its divisors is an integer number (395777072).

Almost surely, 2^1187331213 is an apocalyptic number.

It is an amenable number.

1187331213 is a deficient number, since it is larger than the sum of its proper divisors (395777075).

1187331213 is an equidigital number, since it uses as much as digits as its factorization.

1187331213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395777074.

The product of its digits is 3024, while the sum is 30.

The square root of 1187331213 is about 34457.6727739991. The cubic root of 1187331213 is about 1058.9057216194.

The spelling of 1187331213 in words is "one billion, one hundred eighty-seven million, three hundred thirty-one thousand, two hundred thirteen".