1331133049 has 2 divisors, whose sum is σ = 1331133050. Its totient is φ = 1331133048.

The previous prime is 1331133017. The next prime is 1331133077. The reversal of 1331133049 is 9403311331.

It is an a-pointer prime, because the next prime (1331133077) can be obtained adding 1331133049 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 713958400 + 617174649 = 26720^2 + 24843^2 .

It is an emirp because it is prime and its reverse (9403311331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331133049 - 2⁵ = 1331133017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331133649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665566524 + 665566525.

It is an arithmetic number, because the mean of its divisors is an integer number (665566525).

Almost surely, 2^1331133049 is an apocalyptic number.

It is an amenable number.

1331133049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331133049 is an equidigital number, since it uses as much as digits as its factorization.

1331133049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 1331133049 is about 36484.6960930196. The cubic root of 1331133049 is about 1100.0366513959.

It can be divided in two parts, 13311 and 33049, that added together give a triangular number (46360 = T₃₀₄).

The spelling of 1331133049 in words is "one billion, three hundred thirty-one million, one hundred thirty-three thousand, forty-nine".