999961942 has 32 divisors (see below), whose sum is σ = 1768854528. Its totient is φ = 415086336.

The previous prime is 999961939. The next prime is 999961943. The reversal of 999961942 is 249169999.

It is a super-2 number, since 2×999961942² = 1999847770896822728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999961943) 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 15 ways as a sum of consecutive naturals, for example, 55993 + ... + 71659.

It is an arithmetic number, because the mean of its divisors is an integer number (55276704).

Almost surely, 2^999961942 is an apocalyptic number.

999961942 is a deficient number, since it is larger than the sum of its proper divisors (768892586).

999961942 is a wasteful number, since it uses less digits than its factorization.

999961942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15820.

The product of its digits is 2834352, while the sum is 58.

The square root of 999961942 is about 31622.1748461424. The cubic root of 999961942 is about 999.9873138391.

The spelling of 999961942 in words is "nine hundred ninety-nine million, nine hundred sixty-one thousand, nine hundred forty-two".