111989357 has 2 divisors, whose sum is σ = 111989358. Its totient is φ = 111989356.

The previous prime is 111989341. The next prime is 111989359. The reversal of 111989357 is 753989111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89226916 + 22762441 = 9446^2 + 4771^2 .

It is an emirp because it is prime and its reverse (753989111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111989357 - 2⁴ = 111989341 is a prime.

Together with 111989359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111989359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55994678 + 55994679.

It is an arithmetic number, because the mean of its divisors is an integer number (55994679).

Almost surely, 2^111989357 is an apocalyptic number.

It is an amenable number.

111989357 is a deficient number, since it is larger than the sum of its proper divisors (1).

111989357 is an equidigital number, since it uses as much as digits as its factorization.

111989357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 44.

The square root of 111989357 is about 10582.5023978263. The cubic root of 111989357 is about 482.0131838132.

The spelling of 111989357 in words is "one hundred eleven million, nine hundred eighty-nine thousand, three hundred fifty-seven".