1720745007 has 4 divisors (see below), whose sum is σ = 2294326680. Its totient is φ = 1147163336.

The previous prime is 1720744997. The next prime is 1720745041. The reversal of 1720745007 is 7005470271.

It is a happy number.

1720745007 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1720745007 - 2²⁴ = 1703967791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720745087) 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, 286790832 + ... + 286790837.

It is an arithmetic number, because the mean of its divisors is an integer number (573581670).

Almost surely, 2^1720745007 is an apocalyptic number.

1720745007 is a deficient number, since it is larger than the sum of its proper divisors (573581673).

1720745007 is an equidigital number, since it uses as much as digits as its factorization.

1720745007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573581672.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 1720745007 is about 41481.8635912130. The cubic root of 1720745007 is about 1198.3182476642.

The spelling of 1720745007 in words is "one billion, seven hundred twenty million, seven hundred forty-five thousand, seven".