111161539 has 2 divisors, whose sum is σ = 111161540. Its totient is φ = 111161538.

The previous prime is 111161527. The next prime is 111161549. The reversal of 111161539 is 935161111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111161539 - 2¹¹ = 111159491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111161549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55580769 + 55580770.

It is an arithmetic number, because the mean of its divisors is an integer number (55580770).

Almost surely, 2^111161539 is an apocalyptic number.

111161539 is a deficient number, since it is larger than the sum of its proper divisors (1).

111161539 is an equidigital number, since it uses as much as digits as its factorization.

111161539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 28.

The square root of 111161539 is about 10543.3172673500. The cubic root of 111161539 is about 480.8225753702.

The spelling of 111161539 in words is "one hundred eleven million, one hundred sixty-one thousand, five hundred thirty-nine".