111090997 has 2 divisors, whose sum is σ = 111090998. Its totient is φ = 111090996.

The previous prime is 111090979. The next prime is 111091003. The reversal of 111090997 is 799090111.

Together with previous prime (111090979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104325796 + 6765201 = 10214^2 + 2601^2 .

It is an emirp because it is prime and its reverse (799090111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111090997 - 2¹¹ = 111088949 is a prime.

It is a super-2 number, since 2×111090997² = 24682419228908018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111090797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55545498 + 55545499.

It is an arithmetic number, because the mean of its divisors is an integer number (55545499).

Almost surely, 2^111090997 is an apocalyptic number.

It is an amenable number.

111090997 is a deficient number, since it is larger than the sum of its proper divisors (1).

111090997 is an equidigital number, since it uses as much as digits as its factorization.

111090997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 111090997 is about 10539.9713946481. The cubic root of 111090997 is about 480.7208454503.

The spelling of 111090997 in words is "one hundred eleven million, ninety thousand, nine hundred ninety-seven".