111319997 has 2 divisors, whose sum is σ = 111319998. Its totient is φ = 111319996.

The previous prime is 111319987. The next prime is 111320047. The reversal of 111319997 is 799913111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106275481 + 5044516 = 10309^2 + 2246^2 .

It is an emirp because it is prime and its reverse (799913111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111319997 - 2⁶ = 111319933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111319907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55659998 + 55659999.

It is an arithmetic number, because the mean of its divisors is an integer number (55659999).

Almost surely, 2^111319997 is an apocalyptic number.

It is an amenable number.

111319997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111319997 is an equidigital number, since it uses as much as digits as its factorization.

111319997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15309, while the sum is 41.

The square root of 111319997 is about 10550.8292091191. The cubic root of 111319997 is about 481.0509337592.

The spelling of 111319997 in words is "one hundred eleven million, three hundred nineteen thousand, nine hundred ninety-seven".