111946721 has 2 divisors, whose sum is σ = 111946722. Its totient is φ = 111946720.

The previous prime is 111946693. The next prime is 111946729. The reversal of 111946721 is 127649111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108472225 + 3474496 = 10415^2 + 1864^2 .

It is a cyclic number.

It is not a de Polignac number, because 111946721 - 2⁶ = 111946657 is a prime.

It is a super-3 number, since 3×111946721³ (a number of 25 digits) contains 333 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 (111946729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55973360 + 55973361.

It is an arithmetic number, because the mean of its divisors is an integer number (55973361).

Almost surely, 2^111946721 is an apocalyptic number.

It is an amenable number.

111946721 is a deficient number, since it is larger than the sum of its proper divisors (1).

111946721 is an equidigital number, since it uses as much as digits as its factorization.

111946721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 111946721 is about 10580.4877486815. The cubic root of 111946721 is about 481.9520062060.

The spelling of 111946721 in words is "one hundred eleven million, nine hundred forty-six thousand, seven hundred twenty-one".