1720699199 has 4 divisors (see below), whose sum is σ = 1738438464. Its totient is φ = 1702959936.

The previous prime is 1720699177. The next prime is 1720699213. The reversal of 1720699199 is 9919960271.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1720699199 - 2⁸ = 1720698943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1720699199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720699139) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8869487 + ... + 8869680.

It is an arithmetic number, because the mean of its divisors is an integer number (434609616).

Almost surely, 2^1720699199 is an apocalyptic number.

1720699199 is a deficient number, since it is larger than the sum of its proper divisors (17739265).

1720699199 is an equidigital number, since it uses as much as digits as its factorization.

1720699199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17739264.

The product of its (nonzero) digits is 551124, while the sum is 53.

The square root of 1720699199 is about 41481.3114426244. The cubic root of 1720699199 is about 1198.3076140822.

The spelling of 1720699199 in words is "one billion, seven hundred twenty million, six hundred ninety-nine thousand, one hundred ninety-nine".