1720662513 has 8 divisors (see below), whose sum is σ = 2310722400. Its totient is φ = 1138855488.

The previous prime is 1720662491. The next prime is 1720662571. The reversal of 1720662513 is 3152660271.

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

It is not a de Polignac number, because 1720662513 - 2¹⁴ = 1720646129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1720662313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2062728 + ... + 2063561.

It is an arithmetic number, because the mean of its divisors is an integer number (288840300).

Almost surely, 2^1720662513 is an apocalyptic number.

It is an amenable number.

1720662513 is a deficient number, since it is larger than the sum of its proper divisors (590059887).

1720662513 is a wasteful number, since it uses less digits than its factorization.

1720662513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126431.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1720662513 is about 41480.8692411333. The cubic root of 1720662513 is about 1198.2990978880.

The spelling of 1720662513 in words is "one billion, seven hundred twenty million, six hundred sixty-two thousand, five hundred thirteen".