769939985 has 4 divisors (see below), whose sum is σ = 923927988. Its totient is φ = 615951984.

The previous prime is 769939969. The next prime is 769939991. The reversal of 769939985 is 589939967.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 235960321 + 533979664 = 15361^2 + 23108^2 .

It is a cyclic number.

It is not a de Polignac number, because 769939985 - 2⁴ = 769939969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76993994 + ... + 76994003.

It is an arithmetic number, because the mean of its divisors is an integer number (230981997).

Almost surely, 2^769939985 is an apocalyptic number.

It is an amenable number.

769939985 is a deficient number, since it is larger than the sum of its proper divisors (153988003).

769939985 is a wasteful number, since it uses less digits than its factorization.

769939985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153988002.

The product of its digits is 33067440, while the sum is 65.

The square root of 769939985 is about 27747.7924347145. The cubic root of 769939985 is about 916.5418319627.

The spelling of 769939985 in words is "seven hundred sixty-nine million, nine hundred thirty-nine thousand, nine hundred eighty-five".