111161097 has 6 divisors (see below), whose sum is σ = 160566042. Its totient is φ = 74107392.

The previous prime is 111161053. The next prime is 111161101. The reversal of 111161097 is 790161111.

It can be written as a sum of positive squares in only one way, i.e., 87160896 + 24000201 = 9336^2 + 4899^2 .

It is not a de Polignac number, because 111161097 - 2⁶ = 111161033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111161097.

It is not an unprimeable number, because it can be changed into a prime (111161597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6175608 + ... + 6175625.

It is an arithmetic number, because the mean of its divisors is an integer number (26761007).

Almost surely, 2^111161097 is an apocalyptic number.

It is an amenable number.

111161097 is a deficient number, since it is larger than the sum of its proper divisors (49404945).

111161097 is a wasteful number, since it uses less digits than its factorization.

111161097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12351239 (or 12351236 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 27.

The square root of 111161097 is about 10543.2963061843. The cubic root of 111161097 is about 480.8219380878.

The spelling of 111161097 in words is "one hundred eleven million, one hundred sixty-one thousand, ninety-seven".