1720720106 has 16 divisors (see below), whose sum is σ = 2961028224. Its totient is φ = 734645904.

The previous prime is 1720720097. The next prime is 1720720159. The reversal of 1720720106 is 6010270271.

It is a Curzon 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, 229985 + ... + 237348.

It is an arithmetic number, because the mean of its divisors is an integer number (185064264).

Almost surely, 2^1720720106 is an apocalyptic number.

1720720106 is a deficient number, since it is larger than the sum of its proper divisors (1240308118).

1720720106 is a wasteful number, since it uses less digits than its factorization.

1720720106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467605.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1720720106 is about 41481.5634469098. The cubic root of 1720720106 is about 1198.3124673255.

Adding to 1720720106 its reverse (6010270271), we get a palindrome (7730990377).

The spelling of 1720720106 in words is "one billion, seven hundred twenty million, seven hundred twenty thousand, one hundred six".