998925761 has 4 divisors (see below), whose sum is σ = 998989524. Its totient is φ = 998862000.

The previous prime is 998925751. The next prime is 998925791. The reversal of 998925761 is 167529899.

998925761 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 brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 336172225 + 662753536 = 18335^2 + 25744^2 .

It is a cyclic number.

It is not a de Polignac number, because 998925761 - 2¹⁰ = 998924737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 998925697 and 998925706.

It is not an unprimeable number, because it can be changed into a prime (998925751) 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, 9671 + ... + 45731.

It is an arithmetic number, because the mean of its divisors is an integer number (249747381).

Almost surely, 2^998925761 is an apocalyptic number.

It is an amenable number.

998925761 is a deficient number, since it is larger than the sum of its proper divisors (63763).

998925761 is a wasteful number, since it uses less digits than its factorization.

998925761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63762.

The product of its digits is 2449440, while the sum is 56.

The square root of 998925761 is about 31605.7868277314. The cubic root of 998925761 is about 999.6417920357.

The spelling of 998925761 in words is "nine hundred ninety-eight million, nine hundred twenty-five thousand, seven hundred sixty-one".