775579121 has 8 divisors (see below), whose sum is σ = 788097600. Its totient is φ = 763158448.

The previous prime is 775579109. The next prime is 775579127. The reversal of 775579121 is 121975577.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-775579121 is a prime.

It is a super-2 number, since 2×775579121² = 1203045945862265282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775579127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8381 + ... + 40266.

It is an arithmetic number, because the mean of its divisors is an integer number (98512200).

Almost surely, 2^775579121 is an apocalyptic number.

It is an amenable number.

775579121 is a deficient number, since it is larger than the sum of its proper divisors (12518479).

775579121 is a wasteful number, since it uses less digits than its factorization.

775579121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48903.

The product of its digits is 154350, while the sum is 44.

The square root of 775579121 is about 27849.2211919831. The cubic root of 775579121 is about 918.7740132493.

The spelling of 775579121 in words is "seven hundred seventy-five million, five hundred seventy-nine thousand, one hundred twenty-one".