1768721097 has 16 divisors (see below), whose sum is σ = 2770584768. Its totient is φ = 989494080.

The previous prime is 1768721093. The next prime is 1768721111. The reversal of 1768721097 is 7901278671.

It is not a de Polignac number, because 1768721097 - 2² = 1768721093 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1768721093) 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, 2061018 + ... + 2061875.

It is an arithmetic number, because the mean of its divisors is an integer number (173161548).

Almost surely, 2^1768721097 is an apocalyptic number.

It is an amenable number.

1768721097 is a deficient number, since it is larger than the sum of its proper divisors (1001863671).

1768721097 is a wasteful number, since it uses less digits than its factorization.

1768721097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4122920.

The product of its (nonzero) digits is 296352, while the sum is 48.

The square root of 1768721097 is about 42056.1659807453. The cubic root of 1768721097 is about 1209.3530902133.

The spelling of 1768721097 in words is "one billion, seven hundred sixty-eight million, seven hundred twenty-one thousand, ninety-seven".