1720573953 has 16 divisors (see below), whose sum is σ = 2622583680. Its totient is φ = 982901376.

The previous prime is 1720573913. The next prime is 1720573993. The reversal of 1720573953 is 3593750271.

It is an interprime number because it is at equal distance from previous prime (1720573913) and next prime (1720573993).

It is not a de Polignac number, because 1720573953 - 2⁹ = 1720573441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1720573913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78843 + ... + 98271.

It is an arithmetic number, because the mean of its divisors is an integer number (163911480).

Almost surely, 2^1720573953 is an apocalyptic number.

It is an amenable number.

1720573953 is a deficient number, since it is larger than the sum of its proper divisors (902009727).

1720573953 is a wasteful number, since it uses less digits than its factorization.

1720573953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23656.

The product of its (nonzero) digits is 198450, while the sum is 42.

The square root of 1720573953 is about 41479.8017473565. The cubic root of 1720573953 is about 1198.2785392973.

The spelling of 1720573953 in words is "one billion, seven hundred twenty million, five hundred seventy-three thousand, nine hundred fifty-three".