1720913972 has 24 divisors (see below), whose sum is σ = 3069815112. Its totient is φ = 843955200.

The previous prime is 1720913963. The next prime is 1720913989. The reversal of 1720913972 is 2793190271.

It can be written as a sum of positive squares in 4 ways, for example, as 91661476 + 1629252496 = 9574^2 + 40364^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36572 + ... + 69132.

It is an arithmetic number, because the mean of its divisors is an integer number (127908963).

Almost surely, 2^1720913972 is an apocalyptic number.

It is an amenable number.

1720913972 is a deficient number, since it is larger than the sum of its proper divisors (1348901140).

1720913972 is a wasteful number, since it uses less digits than its factorization.

1720913972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32819 (or 32817 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 1720913972 is about 41483.9001541562. The cubic root of 1720913972 is about 1198.3574685084.

The spelling of 1720913972 in words is "one billion, seven hundred twenty million, nine hundred thirteen thousand, nine hundred seventy-two".