989760769 has 4 divisors (see below), whose sum is σ = 989835696. Its totient is φ = 989685844.

The previous prime is 989760763. The next prime is 989760809. The reversal of 989760769 is 967067989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 967067989 = 12941 ⋅74729.

It is a cyclic number.

It is not a de Polignac number, because 989760769 - 2⁹ = 989760257 is a prime.

It is a super-2 number, since 2×989760769² = 1959252759702942722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (989760763) 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, 11779 + ... + 46024.

It is an arithmetic number, because the mean of its divisors is an integer number (247458924).

Almost surely, 2^989760769 is an apocalyptic number.

It is an amenable number.

989760769 is a deficient number, since it is larger than the sum of its proper divisors (74927).

989760769 is a wasteful number, since it uses less digits than its factorization.

989760769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74926.

The product of its (nonzero) digits is 10287648, while the sum is 61.

The square root of 989760769 is about 31460.4635852684. The cubic root of 989760769 is about 996.5752071842.

The spelling of 989760769 in words is "nine hundred eighty-nine million, seven hundred sixty thousand, seven hundred sixty-nine".