1779997697 has 8 divisors (see below), whose sum is σ = 1786134240. Its totient is φ = 1773870400.

The previous prime is 1779997673. The next prime is 1779997717. The reversal of 1779997697 is 7967999771.

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

It is a cyclic number.

It is not a de Polignac number, because 1779997697 - 2⁸ = 1779997441 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 1779997697.

It is not an unprimeable number, because it can be changed into a prime (1779997607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 792458 + ... + 794700.

It is an arithmetic number, because the mean of its divisors is an integer number (223266780).

Almost surely, 2^1779997697 is an apocalyptic number.

It is an amenable number.

1779997697 is a deficient number, since it is larger than the sum of its proper divisors (6136543).

1779997697 is a wasteful number, since it uses less digits than its factorization.

1779997697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4623.

The product of its digits is 94517766, while the sum is 71.

The square root of 1779997697 is about 42190.0189262816. The cubic root of 1779997697 is about 1211.9177514377.

The spelling of 1779997697 in words is "one billion, seven hundred seventy-nine million, nine hundred ninety-seven thousand, six hundred ninety-seven".