1311486377 has 4 divisors (see below), whose sum is σ = 1315623876. Its totient is φ = 1307348880.

The previous prime is 1311486373. The next prime is 1311486383. The reversal of 1311486377 is 7736841131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 807753241 + 503733136 = 28421^2 + 22444^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311486377 - 2² = 1311486373 is a prime.

It is a super-2 number, since 2×1311486377² = 3439993034113172258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311486373) 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, 2068274 + ... + 2068907.

It is an arithmetic number, because the mean of its divisors is an integer number (328905969).

Almost surely, 2^1311486377 is an apocalyptic number.

It is an amenable number.

1311486377 is a deficient number, since it is larger than the sum of its proper divisors (4137499).

1311486377 is an equidigital number, since it uses as much as digits as its factorization.

1311486377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137498.

The product of its digits is 84672, while the sum is 41.

The square root of 1311486377 is about 36214.4498370471. The cubic root of 1311486377 is about 1094.5978596012.

The spelling of 1311486377 in words is "one billion, three hundred eleven million, four hundred eighty-six thousand, three hundred seventy-seven".