1720613087 has 4 divisors (see below), whose sum is σ = 1720933056. Its totient is φ = 1720293120.

The previous prime is 1720613071. The next prime is 1720613099. The reversal of 1720613087 is 7803160271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1720613087 - 2⁴ = 1720613071 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 (1720693087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151778 + ... + 162719.

It is an arithmetic number, because the mean of its divisors is an integer number (430233264).

Almost surely, 2^1720613087 is an apocalyptic number.

1720613087 is a deficient number, since it is larger than the sum of its proper divisors (319969).

1720613087 is an equidigital number, since it uses as much as digits as its factorization.

1720613087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319968.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1720613087 is about 41480.2734682403. The cubic root of 1720613087 is about 1198.2876240714.

The spelling of 1720613087 in words is "one billion, seven hundred twenty million, six hundred thirteen thousand, eighty-seven".