999960642 has 12 divisors (see below), whose sum is σ = 2166581430. Its totient is φ = 333320208.

The previous prime is 999960613. The next prime is 999960667. The reversal of 999960642 is 246069999.

It can be written as a sum of positive squares in only one way, i.e., 690165441 + 309795201 = 26271^2 + 17601^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27776667 + ... + 27776702.

Almost surely, 2^999960642 is an apocalyptic number.

999960642 is an abundant number, since it is smaller than the sum of its proper divisors (1166620788).

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

999960642 is a wasteful number, since it uses less digits than its factorization.

999960642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55553377 (or 55553374 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 999960642 is about 31622.1542909398. The cubic root of 999960642 is about 999.9868804945.

The spelling of 999960642 in words is "nine hundred ninety-nine million, nine hundred sixty thousand, six hundred forty-two".