998992729 has 4 divisors (see below), whose sum is σ = 1141705984. Its totient is φ = 856279476.

The previous prime is 998992699. The next prime is 998992751. The reversal of 998992729 is 927299899.

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.

It is a cyclic number.

It is not a de Polignac number, because 998992729 - 2⁹ = 998992217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998992759) 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, 71356617 + ... + 71356630.

It is an arithmetic number, because the mean of its divisors is an integer number (285426496).

Almost surely, 2^998992729 is an apocalyptic number.

It is an amenable number.

998992729 is a deficient number, since it is larger than the sum of its proper divisors (142713255).

998992729 is a wasteful number, since it uses less digits than its factorization.

998992729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142713254.

The product of its digits is 13226976, while the sum is 64.

The square root of 998992729 is about 31606.8462362191. The cubic root of 998992729 is about 999.6641302041.

The spelling of 998992729 in words is "nine hundred ninety-eight million, nine hundred ninety-two thousand, seven hundred twenty-nine".