999497170994 has 32 divisors (see below), whose sum is σ = 1733789145600. Its totient is φ = 423281246400.

The previous prime is 999497170979. The next prime is 999497171009. The reversal of 999497170994 is 499071794999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (999497170979) and next prime (999497171009).

It is an unprimeable number.

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, 25367 + ... + 1414085.

It is an arithmetic number, because the mean of its divisors is an integer number (54180910800).

Almost surely, 2^999497170994 is an apocalyptic number.

999497170994 is a deficient number, since it is larger than the sum of its proper divisors (734291974606).

999497170994 is a wasteful number, since it uses less digits than its factorization.

999497170994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389338.

The product of its (nonzero) digits is 416649744, while the sum is 77.

The spelling of 999497170994 in words is "nine hundred ninety-nine billion, four hundred ninety-seven million, one hundred seventy thousand, nine hundred ninety-four".