998799677 has 8 divisors (see below), whose sum is σ = 1005495480. Its totient is φ = 992125440.

The previous prime is 998799667. The next prime is 998799689. The reversal of 998799677 is 776997899.

It can be written as a sum of positive squares in 4 ways, for example, as 642571801 + 356227876 = 25349^2 + 18874^2 .

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 998799677 - 2¹⁶ = 998734141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998799677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998799667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93503 + ... + 103635.

It is an arithmetic number, because the mean of its divisors is an integer number (125686935).

Almost surely, 2^998799677 is an apocalyptic number.

It is an amenable number.

998799677 is a deficient number, since it is larger than the sum of its proper divisors (6695803).

998799677 is a wasteful number, since it uses less digits than its factorization.

998799677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10783.

The product of its digits is 108020304, while the sum is 71.

The square root of 998799677 is about 31603.7921300593. The cubic root of 998799677 is about 999.5997321404.

The spelling of 998799677 in words is "nine hundred ninety-eight million, seven hundred ninety-nine thousand, six hundred seventy-seven".