1311517877 has 2 divisors, whose sum is σ = 1311517878. Its totient is φ = 1311517876.

The previous prime is 1311517871. The next prime is 1311517957. The reversal of 1311517877 is 7787151131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1304726641 + 6791236 = 36121^2 + 2606^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311517877 - 2⁴ = 1311517861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311517871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655758938 + 655758939.

It is an arithmetic number, because the mean of its divisors is an integer number (655758939).

Almost surely, 2^1311517877 is an apocalyptic number.

It is an amenable number.

1311517877 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311517877 is an equidigital number, since it uses as much as digits as its factorization.

1311517877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 41.

The square root of 1311517877 is about 36214.8847437072. The cubic root of 1311517877 is about 1094.6066230819.

The spelling of 1311517877 in words is "one billion, three hundred eleven million, five hundred seventeen thousand, eight hundred seventy-seven".