989894769 has 32 divisors (see below), whose sum is σ = 1405845504. Its totient is φ = 618266880.

The previous prime is 989894767. The next prime is 989894809. The reversal of 989894769 is 967498989.

It is not a de Polignac number, because 989894769 - 2¹ = 989894767 is a prime.

It is a super-2 number, since 2×989894769² = 1959783307387126722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

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

It is not an unprimeable number, because it can be changed into a prime (989894767) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 726649 + ... + 728009.

It is an arithmetic number, because the mean of its divisors is an integer number (43932672).

Almost surely, 2^989894769 is an apocalyptic number.

It is an amenable number.

989894769 is a deficient number, since it is larger than the sum of its proper divisors (415950735).

989894769 is a wasteful number, since it uses less digits than its factorization.

989894769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597.

The product of its digits is 70543872, while the sum is 69.

The square root of 989894769 is about 31462.5931703030. The cubic root of 989894769 is about 996.6201793485.

It can be divided in two parts, 98989476 and 9, that added together give a triangular number (98989485 = T₁₄₀₇₀).

The spelling of 989894769 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, seven hundred sixty-nine".