1109720613 has 8 divisors (see below), whose sum is σ = 1519617568. Its totient is φ = 719818704.

The previous prime is 1109720567. The next prime is 1109720621. The reversal of 1109720613 is 3160279011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1109720613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109720653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4998631 + ... + 4998852.

It is an arithmetic number, because the mean of its divisors is an integer number (189952196).

Almost surely, 2^1109720613 is an apocalyptic number.

It is an amenable number.

1109720613 is a deficient number, since it is larger than the sum of its proper divisors (409896955).

1109720613 is an equidigital number, since it uses as much as digits as its factorization.

1109720613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9997523.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1109720613 is about 33312.4693320684. The cubic root of 1109720613 is about 1035.3119281992.

Adding to 1109720613 its reverse (3160279011), we get a palindrome (4269999624).

The spelling of 1109720613 in words is "one billion, one hundred nine million, seven hundred twenty thousand, six hundred thirteen".