1311194069 has 2 divisors, whose sum is σ = 1311194070. Its totient is φ = 1311194068.

The previous prime is 1311194057. The next prime is 1311194117. The reversal of 1311194069 is 9604911131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1007110225 + 304083844 = 31735^2 + 17438^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311194069 - 2⁸ = 1311193813 is a prime.

It is a super-2 number, since 2×1311194069² = 3438459773161553522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311194029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655597034 + 655597035.

It is an arithmetic number, because the mean of its divisors is an integer number (655597035).

Almost surely, 2^1311194069 is an apocalyptic number.

It is an amenable number.

1311194069 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311194069 is an equidigital number, since it uses as much as digits as its factorization.

1311194069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 1311194069 is about 36210.4138197839. The cubic root of 1311194069 is about 1094.5165311455.

The spelling of 1311194069 in words is "one billion, three hundred eleven million, one hundred ninety-four thousand, sixty-nine".