1311899051 has 2 divisors, whose sum is σ = 1311899052. Its totient is φ = 1311899050.

The previous prime is 1311899033. The next prime is 1311899059. The reversal of 1311899051 is 1509981131.

It is a strong prime.

It is an emirp because it is prime and its reverse (1509981131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311899051 - 2²² = 1307704747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311898996 and 1311899014.

It is not a weakly prime, because it can be changed into another prime (1311899059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655949525 + 655949526.

It is an arithmetic number, because the mean of its divisors is an integer number (655949526).

Almost surely, 2^1311899051 is an apocalyptic number.

1311899051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311899051 is an equidigital number, since it uses as much as digits as its factorization.

1311899051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 38.

The square root of 1311899051 is about 36220.1470317281. The cubic root of 1311899051 is about 1094.7126567542.

The spelling of 1311899051 in words is "one billion, three hundred eleven million, eight hundred ninety-nine thousand, fifty-one".