111965801 has 2 divisors, whose sum is σ = 111965802. Its totient is φ = 111965800.

The previous prime is 111965779. The next prime is 111965809. The reversal of 111965801 is 108569111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108264025 + 3701776 = 10405^2 + 1924^2 .

It is a cyclic number.

It is not a de Polignac number, because 111965801 - 2²² = 107771497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111965809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55982900 + 55982901.

It is an arithmetic number, because the mean of its divisors is an integer number (55982901).

Almost surely, 2^111965801 is an apocalyptic number.

It is an amenable number.

111965801 is a deficient number, since it is larger than the sum of its proper divisors (1).

111965801 is an equidigital number, since it uses as much as digits as its factorization.

111965801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 32.

The square root of 111965801 is about 10581.3893700213. The cubic root of 111965801 is about 481.9793856647.

The spelling of 111965801 in words is "one hundred eleven million, nine hundred sixty-five thousand, eight hundred one".