999998964 has 18 divisors (see below), whose sum is σ = 2527775250. Its totient is φ = 333332976.

The previous prime is 999998959. The next prime is 999998971. The reversal of 999998964 is 469899999.

It can be written as a sum of positive squares in only one way, i.e., 870722064 + 129276900 = 29508^2 + 11370^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 999998892 and 999998901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13888839 + ... + 13888910.

Almost surely, 2^999998964 is an apocalyptic number.

It is an amenable number.

999998964 is an abundant number, since it is smaller than the sum of its proper divisors (1527776286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999998964 is a wasteful number, since it uses less digits than its factorization.

999998964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27777759 (or 27777754 counting only the distinct ones).

The product of its digits is 102036672, while the sum is 72.

The square root of 999998964 is about 31622.7602210813. The cubic root of 999998964 is about 999.9996546665. Note that the first 3 decimals are identical.

The spelling of 999998964 in words is "nine hundred ninety-nine million, nine hundred ninety-eight thousand, nine hundred sixty-four".