110721409 has 2 divisors, whose sum is σ = 110721410. Its totient is φ = 110721408.

The previous prime is 110721397. The next prime is 110721421. The reversal of 110721409 is 904127011.

It is a balanced prime because it is at equal distance from previous prime (110721397) and next prime (110721421).

It can be written as a sum of positive squares in only one way, i.e., 106193025 + 4528384 = 10305^2 + 2128^2 .

It is a cyclic number.

It is not a de Polignac number, because 110721409 - 2²⁵ = 77166977 is a prime.

It is not a weakly prime, because it can be changed into another prime (110721469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55360704 + 55360705.

It is an arithmetic number, because the mean of its divisors is an integer number (55360705).

Almost surely, 2^110721409 is an apocalyptic number.

It is an amenable number.

110721409 is a deficient number, since it is larger than the sum of its proper divisors (1).

110721409 is an equidigital number, since it uses as much as digits as its factorization.

110721409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 110721409 is about 10522.4241028387. The cubic root of 110721409 is about 480.1871506900.

The spelling of 110721409 in words is "one hundred ten million, seven hundred twenty-one thousand, four hundred nine".