111820039 has 2 divisors, whose sum is σ = 111820040. Its totient is φ = 111820038.

The previous prime is 111820021. The next prime is 111820057. The reversal of 111820039 is 930028111.

It is a balanced prime because it is at equal distance from previous prime (111820021) and next prime (111820057).

It is an emirp because it is prime and its reverse (930028111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111820039 is a prime.

It is a super-2 number, since 2×111820039² = 25007442243923042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111819995 and 111820022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111820139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55910019 + 55910020.

It is an arithmetic number, because the mean of its divisors is an integer number (55910020).

Almost surely, 2^111820039 is an apocalyptic number.

111820039 is a deficient number, since it is larger than the sum of its proper divisors (1).

111820039 is an equidigital number, since it uses as much as digits as its factorization.

111820039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 111820039 is about 10574.4994680599. The cubic root of 111820039 is about 481.7701408556.

The spelling of 111820039 in words is "one hundred eleven million, eight hundred twenty thousand, thirty-nine".