1149337561 has 2 divisors, whose sum is σ = 1149337562. Its totient is φ = 1149337560.

The previous prime is 1149337499. The next prime is 1149337573. The reversal of 1149337561 is 1657339411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1114291161 + 35046400 = 33381^2 + 5920^2 .

It is a cyclic number.

It is not a de Polignac number, because 1149337561 - 2¹¹ = 1149335513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1149337061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574668780 + 574668781.

It is an arithmetic number, because the mean of its divisors is an integer number (574668781).

Almost surely, 2^1149337561 is an apocalyptic number.

It is an amenable number.

1149337561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149337561 is an equidigital number, since it uses as much as digits as its factorization.

1149337561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 1149337561 is about 33901.8813784722. The cubic root of 1149337561 is about 1047.4883462950.

The spelling of 1149337561 in words is "one billion, one hundred forty-nine million, three hundred thirty-seven thousand, five hundred sixty-one".