998971699 has 8 divisors (see below), whose sum is σ = 1112974848. Its totient is φ = 888833160.

The previous prime is 998971681. The next prime is 998971703. The reversal of 998971699 is 996179899.

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 998971699 - 2¹⁵ = 998938931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998971619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965607 + ... + 966640.

It is an arithmetic number, because the mean of its divisors is an integer number (139121856).

Almost surely, 2^998971699 is an apocalyptic number.

998971699 is a deficient number, since it is larger than the sum of its proper divisors (114003149).

998971699 is a wasteful number, since it uses less digits than its factorization.

998971699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932305.

The product of its digits is 19840464, while the sum is 67.

The square root of 998971699 is about 31606.5135533801. The cubic root of 998971699 is about 999.6571154436.

It can be divided in two parts, 99 and 8971699, that added together give a palindrome (8971798).

The spelling of 998971699 in words is "nine hundred ninety-eight million, nine hundred seventy-one thousand, six hundred ninety-nine".