769898989 has 4 divisors (see below), whose sum is σ = 796447260. Its totient is φ = 743350720.

The previous prime is 769898957. The next prime is 769898999. The reversal of 769898989 is 989898967.

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 142396489 + 627502500 = 11933^2 + 25050^2 .

It is a cyclic number.

It is not a de Polignac number, because 769898989 - 2⁵ = 769898957 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (769898939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13274092 + ... + 13274149.

It is an arithmetic number, because the mean of its divisors is an integer number (199111815).

Almost surely, 2^769898989 is an apocalyptic number.

It is an amenable number.

769898989 is a deficient number, since it is larger than the sum of its proper divisors (26548271).

769898989 is a wasteful number, since it uses less digits than its factorization.

769898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26548270.

The product of its digits is 141087744, while the sum is 73.

The square root of 769898989 is about 27747.0536994471. The cubic root of 769898989 is about 916.5255643676.

The spelling of 769898989 in words is "seven hundred sixty-nine million, eight hundred ninety-eight thousand, nine hundred eighty-nine".