111253609 has 2 divisors, whose sum is σ = 111253610. Its totient is φ = 111253608.

The previous prime is 111253529. The next prime is 111253619. The reversal of 111253609 is 906352111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111239209 + 14400 = 10547^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 111253609 - 2¹¹ = 111251561 is a prime.

It is not a weakly prime, because it can be changed into another prime (111253619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55626804 + 55626805.

It is an arithmetic number, because the mean of its divisors is an integer number (55626805).

Almost surely, 2^111253609 is an apocalyptic number.

It is an amenable number.

111253609 is a deficient number, since it is larger than the sum of its proper divisors (1).

111253609 is an equidigital number, since it uses as much as digits as its factorization.

111253609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 111253609 is about 10547.6826364847. The cubic root of 111253609 is about 480.9552864933.

The spelling of 111253609 in words is "one hundred eleven million, two hundred fifty-three thousand, six hundred nine".