111863879 has 2 divisors, whose sum is σ = 111863880. Its totient is φ = 111863878.

The previous prime is 111863821. The next prime is 111863897. The reversal of 111863879 is 978368111.

Together with next prime (111863897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111863879 - 2⁸ = 111863623 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111863809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55931939 + 55931940.

It is an arithmetic number, because the mean of its divisors is an integer number (55931940).

Almost surely, 2^111863879 is an apocalyptic number.

111863879 is a deficient number, since it is larger than the sum of its proper divisors (1).

111863879 is an equidigital number, since it uses as much as digits as its factorization.

111863879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 111863879 is about 10576.5721762772. The cubic root of 111863879 is about 481.8330933269.

The spelling of 111863879 in words is "one hundred eleven million, eight hundred sixty-three thousand, eight hundred seventy-nine".