1311127477 has 4 divisors (see below), whose sum is σ = 1430320896. Its totient is φ = 1191934060.

The previous prime is 1311127453. The next prime is 1311127487. The reversal of 1311127477 is 7747211131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1311127477 - 2²⁷ = 1176909749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311127427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59596693 + ... + 59596714.

It is an arithmetic number, because the mean of its divisors is an integer number (357580224).

Almost surely, 2^1311127477 is an apocalyptic number.

It is an amenable number.

1311127477 is a deficient number, since it is larger than the sum of its proper divisors (119193419).

1311127477 is a wasteful number, since it uses less digits than its factorization.

1311127477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119193418.

The product of its digits is 8232, while the sum is 34.

The square root of 1311127477 is about 36209.4942936242. The cubic root of 1311127477 is about 1094.4980016538.

The spelling of 1311127477 in words is "one billion, three hundred eleven million, one hundred twenty-seven thousand, four hundred seventy-seven".