1061111549 has 2 divisors, whose sum is σ = 1061111550. Its totient is φ = 1061111548.

The previous prime is 1061111507. The next prime is 1061111551. The reversal of 1061111549 is 9451111601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1033622500 + 27489049 = 32150^2 + 5243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061111549 is a prime.

It is a super-2 number, since 2×1061111549² = 2251915438842358802, which contains 22 as substring.

Together with 1061111551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061111749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530555774 + 530555775.

It is an arithmetic number, because the mean of its divisors is an integer number (530555775).

Almost surely, 2^1061111549 is an apocalyptic number.

It is an amenable number.

1061111549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061111549 is an equidigital number, since it uses as much as digits as its factorization.

1061111549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 1061111549 is about 32574.7071974561. The cubic root of 1061111549 is about 1019.9690971670.

The spelling of 1061111549 in words is "one billion, sixty-one million, one hundred eleven thousand, five hundred forty-nine".