998935729 has 4 divisors (see below), whose sum is σ = 1089748080. Its totient is φ = 908123380.

The previous prime is 998935687. The next prime is 998935757. The reversal of 998935729 is 927539899.

998935729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 998935729 - 2¹⁷ = 998804657 is a prime.

It is a super-2 number, since 2×998935729² = 1995745181345522882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998935429) 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, 45406159 + ... + 45406180.

It is an arithmetic number, because the mean of its divisors is an integer number (272437020).

Almost surely, 2^998935729 is an apocalyptic number.

It is an amenable number.

998935729 is a deficient number, since it is larger than the sum of its proper divisors (90812351).

998935729 is a wasteful number, since it uses less digits than its factorization.

998935729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90812350.

The product of its digits is 11022480, while the sum is 61.

The square root of 998935729 is about 31605.9445199791. The cubic root of 998935729 is about 999.6451170730.

The spelling of 998935729 in words is "nine hundred ninety-eight million, nine hundred thirty-five thousand, seven hundred twenty-nine".