1720866968 has 8 divisors (see below), whose sum is σ = 3226625580. Its totient is φ = 860433480.

The previous prime is 1720866967. The next prime is 1720867013. The reversal of 1720866968 is 8696680271.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1720866968² = 5922766243107026048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720866967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107554178 + ... + 107554193.

Almost surely, 2^1720866968 is an apocalyptic number.

It is an amenable number.

1720866968 is a deficient number, since it is larger than the sum of its proper divisors (1505758612).

1720866968 is a wasteful number, since it uses less digits than its factorization.

1720866968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215108377 (or 215108373 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 1720866968 is about 41483.3336172492. Note that the first 3 decimals coincide. The cubic root of 1720866968 is about 1198.3465580062.

The spelling of 1720866968 in words is "one billion, seven hundred twenty million, eight hundred sixty-six thousand, nine hundred sixty-eight".