998563965 has 16 divisors (see below), whose sum is σ = 1825945728. Its totient is φ = 456486336.

The previous prime is 998563963. The next prime is 998563987. The reversal of 998563965 is 569365899.

It is not a de Polignac number, because 998563965 - 2¹ = 998563963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998563899 and 998563908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998563963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4754962 + ... + 4755171.

It is an arithmetic number, because the mean of its divisors is an integer number (114121608).

Almost surely, 2^998563965 is an apocalyptic number.

It is an amenable number.

998563965 is a deficient number, since it is larger than the sum of its proper divisors (827381763).

998563965 is a wasteful number, since it uses less digits than its factorization.

998563965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9510148.

The product of its digits is 15746400, while the sum is 60.

The square root of 998563965 is about 31600.0627372795. The cubic root of 998563965 is about 999.5210923507.

The spelling of 998563965 in words is "nine hundred ninety-eight million, five hundred sixty-three thousand, nine hundred sixty-five".