769123121 has 8 divisors (see below), whose sum is σ = 843915240. Its totient is φ = 696563712.

The previous prime is 769123111. The next prime is 769123127. The reversal of 769123121 is 121321967.

769123121 = 2641² + 2642² + ... + 2746².

It can be written as a sum of positive squares in 4 ways, for example, as 36663025 + 732460096 = 6055^2 + 27064^2 .

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

It is not a de Polignac number, because 769123121 - 2⁶ = 769123057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (769123127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557456 + ... + 558833.

It is an arithmetic number, because the mean of its divisors is an integer number (105489405).

Almost surely, 2^769123121 is an apocalyptic number.

It is an amenable number.

769123121 is a deficient number, since it is larger than the sum of its proper divisors (74792119).

769123121 is a wasteful number, since it uses less digits than its factorization.

769123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116355.

The product of its digits is 4536, while the sum is 32.

The square root of 769123121 is about 27733.0690872828. The cubic root of 769123121 is about 916.2175837656.

The spelling of 769123121 in words is "seven hundred sixty-nine million, one hundred twenty-three thousand, one hundred twenty-one".