111520879 has 2 divisors, whose sum is σ = 111520880. Its totient is φ = 111520878.

The previous prime is 111520847. The next prime is 111520883. The reversal of 111520879 is 978025111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111520879 - 2⁵ = 111520847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111520579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55760439 + 55760440.

It is an arithmetic number, because the mean of its divisors is an integer number (55760440).

Almost surely, 2^111520879 is an apocalyptic number.

111520879 is a deficient number, since it is larger than the sum of its proper divisors (1).

111520879 is an equidigital number, since it uses as much as digits as its factorization.

111520879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 111520879 is about 10560.3446439972. The cubic root of 111520879 is about 481.3401193125.

The spelling of 111520879 in words is "one hundred eleven million, five hundred twenty thousand, eight hundred seventy-nine".