999898739 has 8 divisors (see below), whose sum is σ = 1158396000. Its totient is φ = 845315136.

The previous prime is 999898721. The next prime is 999898787. The reversal of 999898739 is 937898999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999898739 - 2²⁴ = 983121523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999898709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 977864 + ... + 978885.

It is an arithmetic number, because the mean of its divisors is an integer number (144799500).

Almost surely, 2^999898739 is an apocalyptic number.

999898739 is a deficient number, since it is larger than the sum of its proper divisors (158497261).

999898739 is a wasteful number, since it uses less digits than its factorization.

999898739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956829.

The product of its digits is 79361856, while the sum is 71.

The square root of 999898739 is about 31621.1754841593. The cubic root of 999898739 is about 999.9662451940.

The spelling of 999898739 in words is "nine hundred ninety-nine million, eight hundred ninety-eight thousand, seven hundred thirty-nine".