1331579149 has 2 divisors, whose sum is σ = 1331579150. Its totient is φ = 1331579148.

The previous prime is 1331579143. The next prime is 1331579173. The reversal of 1331579149 is 9419751331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1331520100 + 59049 = 36490^2 + 243^2 .

It is an emirp because it is prime and its reverse (9419751331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331579149 - 2³ = 1331579141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331579141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665789574 + 665789575.

It is an arithmetic number, because the mean of its divisors is an integer number (665789575).

Almost surely, 2^1331579149 is an apocalyptic number.

It is an amenable number.

1331579149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331579149 is an equidigital number, since it uses as much as digits as its factorization.

1331579149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 43.

The square root of 1331579149 is about 36490.8091031153. The cubic root of 1331579149 is about 1100.1595220441.

The spelling of 1331579149 in words is "one billion, three hundred thirty-one million, five hundred seventy-nine thousand, one hundred forty-nine".