1311906899 has 2 divisors, whose sum is σ = 1311906900. Its totient is φ = 1311906898.

The previous prime is 1311906863. The next prime is 1311906907. The reversal of 1311906899 is 9986091131.

It is a strong prime.

It is an emirp because it is prime and its reverse (9986091131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311906899 - 2¹² = 1311902803 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1311906829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655953449 + 655953450.

It is an arithmetic number, because the mean of its divisors is an integer number (655953450).

Almost surely, 2^1311906899 is an apocalyptic number.

1311906899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311906899 is an equidigital number, since it uses as much as digits as its factorization.

1311906899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 1311906899 is about 36220.2553690611. The cubic root of 1311906899 is about 1094.7148396680.

The spelling of 1311906899 in words is "one billion, three hundred eleven million, nine hundred six thousand, eight hundred ninety-nine".