989892729 has 12 divisors (see below), whose sum is σ = 1634108736. Its totient is φ = 565652952.

The previous prime is 989892719. The next prime is 989892749. The reversal of 989892729 is 927298989.

It is not a de Polignac number, because 989892729 - 2⁷ = 989892601 is a prime.

It is a super-2 number, since 2×989892729² = 1959775229854134882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 15712583 = 989892729 / (9 + 8 + 9 + 8 + 9 + 2 + 7 + 2 + 9).

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 (989892719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7856229 + ... + 7856354.

It is an arithmetic number, because the mean of its divisors is an integer number (136175728).

Almost surely, 2^989892729 is an apocalyptic number.

It is an amenable number.

989892729 is a deficient number, since it is larger than the sum of its proper divisors (644216007).

989892729 is a wasteful number, since it uses less digits than its factorization.

989892729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15712596 (or 15712593 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 989892729 is about 31462.5607508353. The cubic root of 989892729 is about 996.6194947280.

The spelling of 989892729 in words is "nine hundred eighty-nine million, eight hundred ninety-two thousand, seven hundred twenty-nine".