1311006091 has 4 divisors (see below), whose sum is σ = 1313850384. Its totient is φ = 1308161800.

The previous prime is 1311006077. The next prime is 1311006107. The reversal of 1311006091 is 1906001131.

It is a happy number.

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 1311006091 - 2⁷ = 1311005963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311006001) 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, 1421455 + ... + 1422376.

It is an arithmetic number, because the mean of its divisors is an integer number (328462596).

Almost surely, 2^1311006091 is an apocalyptic number.

1311006091 is a deficient number, since it is larger than the sum of its proper divisors (2844293).

1311006091 is an equidigital number, since it uses as much as digits as its factorization.

1311006091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844292.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1311006091 is about 36207.8180922297. The cubic root of 1311006091 is about 1094.4642238971.

The spelling of 1311006091 in words is "one billion, three hundred eleven million, six thousand, ninety-one".