111909953 has 2 divisors, whose sum is σ = 111909954. Its totient is φ = 111909952.

The previous prime is 111909923. The next prime is 111909989. The reversal of 111909953 is 359909111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84953089 + 26956864 = 9217^2 + 5192^2 .

It is a cyclic number.

It is not a de Polignac number, because 111909953 - 2¹⁴ = 111893569 is a prime.

It is not a weakly prime, because it can be changed into another prime (111909913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55954976 + 55954977.

It is an arithmetic number, because the mean of its divisors is an integer number (55954977).

Almost surely, 2^111909953 is an apocalyptic number.

It is an amenable number.

111909953 is a deficient number, since it is larger than the sum of its proper divisors (1).

111909953 is an equidigital number, since it uses as much as digits as its factorization.

111909953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10935, while the sum is 38.

The square root of 111909953 is about 10578.7500679428. The cubic root of 111909953 is about 481.8992360084.

The spelling of 111909953 in words is "one hundred eleven million, nine hundred nine thousand, nine hundred fifty-three".