111739081 has 2 divisors, whose sum is σ = 111739082. Its totient is φ = 111739080.

The previous prime is 111739073. The next prime is 111739091. The reversal of 111739081 is 180937111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85729081 + 26010000 = 9259^2 + 5100^2 .

It is a cyclic number.

It is not a de Polignac number, because 111739081 - 2³ = 111739073 is a prime.

It is a super-2 number, since 2×111739081² = 24971244445449122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111739021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55869540 + 55869541.

It is an arithmetic number, because the mean of its divisors is an integer number (55869541).

Almost surely, 2^111739081 is an apocalyptic number.

It is an amenable number.

111739081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111739081 is an equidigital number, since it uses as much as digits as its factorization.

111739081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 111739081 is about 10570.6707923386. The cubic root of 111739081 is about 481.6538451719.

The spelling of 111739081 in words is "one hundred eleven million, seven hundred thirty-nine thousand, eighty-one".