111790961 has 2 divisors, whose sum is σ = 111790962. Its totient is φ = 111790960.

The previous prime is 111790933. The next prime is 111790967. The reversal of 111790961 is 169097111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96432400 + 15358561 = 9820^2 + 3919^2 .

It is an emirp because it is prime and its reverse (169097111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111790961 - 2⁶ = 111790897 is a prime.

It is a super-2 number, since 2×111790961² = 24994437922607042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111790967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55895480 + 55895481.

It is an arithmetic number, because the mean of its divisors is an integer number (55895481).

Almost surely, 2^111790961 is an apocalyptic number.

It is an amenable number.

111790961 is a deficient number, since it is larger than the sum of its proper divisors (1).

111790961 is an equidigital number, since it uses as much as digits as its factorization.

111790961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 35.

The square root of 111790961 is about 10573.1244672519. The cubic root of 111790961 is about 481.7283769441.

The spelling of 111790961 in words is "one hundred eleven million, seven hundred ninety thousand, nine hundred sixty-one".