769136809 has 8 divisors (see below), whose sum is σ = 887078720. Its totient is φ = 653211216.

The previous prime is 769136807. The next prime is 769136821. The reversal of 769136809 is 908631967.

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

It is not a de Polignac number, because 769136809 - 2¹ = 769136807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (769136801) 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, 503259 + ... + 504784.

It is an arithmetic number, because the mean of its divisors is an integer number (110884840).

Almost surely, 2^769136809 is an apocalyptic number.

It is an amenable number.

769136809 is a deficient number, since it is larger than the sum of its proper divisors (117941911).

769136809 is a wasteful number, since it uses less digits than its factorization.

769136809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008159.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 769136809 is about 27733.3158673823. The cubic root of 769136809 is about 916.2230190080.

The spelling of 769136809 in words is "seven hundred sixty-nine million, one hundred thirty-six thousand, eight hundred nine".