769849889 has 2 divisors, whose sum is σ = 769849890. Its totient is φ = 769849888.

The previous prime is 769849867. The next prime is 769849891. The reversal of 769849889 is 988948967.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392713489 + 377136400 = 19817^2 + 19420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-769849889 is a prime.

Together with 769849891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (769849819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384924944 + 384924945.

It is an arithmetic number, because the mean of its divisors is an integer number (384924945).

Almost surely, 2^769849889 is an apocalyptic number.

It is an amenable number.

769849889 is a deficient number, since it is larger than the sum of its proper divisors (1).

769849889 is an equidigital number, since it uses as much as digits as its factorization.

769849889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 68.

The square root of 769849889 is about 27746.1689067158. The cubic root of 769849889 is about 916.5060802697.

The spelling of 769849889 in words is "seven hundred sixty-nine million, eight hundred forty-nine thousand, eight hundred eighty-nine".