1720247023 has 16 divisors (see below), whose sum is σ = 2012688000. Its totient is φ = 1453589280.

The previous prime is 1720247003. The next prime is 1720247033. The reversal of 1720247023 is 3207420271.

It is not a de Polignac number, because 1720247023 - 2¹³ = 1720238831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1720246982 and 1720247000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720247003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66573 + ... + 88726.

It is an arithmetic number, because the mean of its divisors is an integer number (125793000).

Almost surely, 2^1720247023 is an apocalyptic number.

1720247023 is a deficient number, since it is larger than the sum of its proper divisors (292440977).

1720247023 is a wasteful number, since it uses less digits than its factorization.

1720247023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155382.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 1720247023 is about 41475.8607264515. The cubic root of 1720247023 is about 1198.2026386524.

Adding to 1720247023 its reverse (3207420271), we get a palindrome (4927667294).

The spelling of 1720247023 in words is "one billion, seven hundred twenty million, two hundred forty-seven thousand, twenty-three".