1720055113 has 4 divisors (see below), whose sum is σ = 1965777280. Its totient is φ = 1474332948.

The previous prime is 1720055089. The next prime is 1720055137. The reversal of 1720055113 is 3115500271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3115500271 = 13 ⋅239653867.

It is an interprime number because it is at equal distance from previous prime (1720055089) and next prime (1720055137).

It is a cyclic number.

It is not a de Polignac number, because 1720055113 - 2⁹ = 1720054601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720055153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122861073 + ... + 122861086.

It is an arithmetic number, because the mean of its divisors is an integer number (491444320).

Almost surely, 2^1720055113 is an apocalyptic number.

It is an amenable number.

1720055113 is a deficient number, since it is larger than the sum of its proper divisors (245722167).

1720055113 is an equidigital number, since it uses as much as digits as its factorization.

1720055113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245722166.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 1720055113 is about 41473.5471475494. The cubic root of 1720055113 is about 1198.1580800092.

Adding to 1720055113 its reverse (3115500271), we get a palindrome (4835555384).

The spelling of 1720055113 in words is "one billion, seven hundred twenty million, fifty-five thousand, one hundred thirteen".