111971297 has 2 divisors, whose sum is σ = 111971298. Its totient is φ = 111971296.

The previous prime is 111971281. The next prime is 111971303. The reversal of 111971297 is 792179111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109851361 + 2119936 = 10481^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 111971297 - 2⁴ = 111971281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111971297.

It is not a weakly prime, because it can be changed into another prime (111971207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55985648 + 55985649.

It is an arithmetic number, because the mean of its divisors is an integer number (55985649).

Almost surely, 2^111971297 is an apocalyptic number.

It is an amenable number.

111971297 is a deficient number, since it is larger than the sum of its proper divisors (1).

111971297 is an equidigital number, since it uses as much as digits as its factorization.

111971297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938, while the sum is 38.

The square root of 111971297 is about 10581.6490680801. The cubic root of 111971297 is about 481.9872717494.

The spelling of 111971297 in words is "one hundred eleven million, nine hundred seventy-one thousand, two hundred ninety-seven".