111580409 has 2 divisors, whose sum is σ = 111580410. Its totient is φ = 111580408.

The previous prime is 111580373. The next prime is 111580411. The reversal of 111580409 is 904085111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100000000 + 11580409 = 10000^2 + 3403^2 .

It is an emirp because it is prime and its reverse (904085111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111580409 is a prime.

Together with 111580411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111580459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55790204 + 55790205.

It is an arithmetic number, because the mean of its divisors is an integer number (55790205).

Almost surely, 2^111580409 is an apocalyptic number.

It is an amenable number.

111580409 is a deficient number, since it is larger than the sum of its proper divisors (1).

111580409 is an equidigital number, since it uses as much as digits as its factorization.

111580409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 111580409 is about 10563.1628312736. The cubic root of 111580409 is about 481.4257507521.

The spelling of 111580409 in words is "one hundred eleven million, five hundred eighty thousand, four hundred nine".