1311071077 has 4 divisors (see below), whose sum is σ = 1317284896. Its totient is φ = 1304857260.

The previous prime is 1311071053. The next prime is 1311071101. The reversal of 1311071077 is 7701701131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7701701131 = 17 ⋅453041243.

It is an interprime number because it is at equal distance from previous prime (1311071053) and next prime (1311071101).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311071077 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 (1311074077) 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, 3106593 + ... + 3107014.

It is an arithmetic number, because the mean of its divisors is an integer number (329321224).

Almost surely, 2^1311071077 is an apocalyptic number.

It is an amenable number.

1311071077 is a deficient number, since it is larger than the sum of its proper divisors (6213819).

1311071077 is an equidigital number, since it uses as much as digits as its factorization.

1311071077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6213818.

The product of its (nonzero) digits is 1029, while the sum is 28.

The square root of 1311071077 is about 36208.7154839826. The cubic root of 1311071077 is about 1094.4823076364.

The spelling of 1311071077 in words is "one billion, three hundred eleven million, seventy-one thousand, seventy-seven".