1720712965 has 8 divisors (see below), whose sum is σ = 2066826528. Its totient is φ = 1375256400.

The previous prime is 1720712947. The next prime is 1720712971. The reversal of 1720712965 is 5692170271.

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

It is not a de Polignac number, because 1720712965 - 2⁵ = 1720712933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 158467 + ... + 168976.

It is an arithmetic number, because the mean of its divisors is an integer number (258353316).

Almost surely, 2^1720712965 is an apocalyptic number.

It is an amenable number.

1720712965 is a deficient number, since it is larger than the sum of its proper divisors (346113563).

1720712965 is a wasteful number, since it uses less digits than its factorization.

1720712965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328499.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 1720712965 is about 41481.4773724370. The cubic root of 1720712965 is about 1198.3108096550.

The spelling of 1720712965 in words is "one billion, seven hundred twenty million, seven hundred twelve thousand, nine hundred sixty-five".