111061649 has 2 divisors, whose sum is σ = 111061650. Its totient is φ = 111061648.

The previous prime is 111061633. The next prime is 111061651. The reversal of 111061649 is 946160111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108826624 + 2235025 = 10432^2 + 1495^2 .

It is a cyclic number.

It is not a de Polignac number, because 111061649 - 2⁴ = 111061633 is a prime.

It is a Sophie Germain prime.

Together with 111061651, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111061849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55530824 + 55530825.

It is an arithmetic number, because the mean of its divisors is an integer number (55530825).

Almost surely, 2^111061649 is an apocalyptic number.

It is an amenable number.

111061649 is a deficient number, since it is larger than the sum of its proper divisors (1).

111061649 is an equidigital number, since it uses as much as digits as its factorization.

111061649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 111061649 is about 10538.5790787943. The cubic root of 111061649 is about 480.6785094726.

The spelling of 111061649 in words is "one hundred eleven million, sixty-one thousand, six hundred forty-nine".