1331135677 has 2 divisors, whose sum is σ = 1331135678. Its totient is φ = 1331135676.

The previous prime is 1331135653. The next prime is 1331135693. The reversal of 1331135677 is 7765311331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1265509476 + 65626201 = 35574^2 + 8101^2 .

It is an emirp because it is prime and its reverse (7765311331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331135677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331115677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665567838 + 665567839.

It is an arithmetic number, because the mean of its divisors is an integer number (665567839).

Almost surely, 2^1331135677 is an apocalyptic number.

It is an amenable number.

1331135677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331135677 is an equidigital number, since it uses as much as digits as its factorization.

1331135677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 37.

The square root of 1331135677 is about 36484.7321081024. The cubic root of 1331135677 is about 1100.0373753141.

The spelling of 1331135677 in words is "one billion, three hundred thirty-one million, one hundred thirty-five thousand, six hundred seventy-seven".