111379813 has 2 divisors, whose sum is σ = 111379814. Its totient is φ = 111379812.

The previous prime is 111379799. The next prime is 111379841. The reversal of 111379813 is 318973111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88021924 + 23357889 = 9382^2 + 4833^2 .

It is a cyclic number.

It is not a de Polignac number, because 111379813 - 2⁵ = 111379781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111379013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55689906 + 55689907.

It is an arithmetic number, because the mean of its divisors is an integer number (55689907).

Almost surely, 2^111379813 is an apocalyptic number.

It is an amenable number.

111379813 is a deficient number, since it is larger than the sum of its proper divisors (1).

111379813 is an equidigital number, since it uses as much as digits as its factorization.

111379813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 34.

The square root of 111379813 is about 10553.6634871499. The cubic root of 111379813 is about 481.1370799776.

The spelling of 111379813 in words is "one hundred eleven million, three hundred seventy-nine thousand, eight hundred thirteen".