1994179947 has 8 divisors (see below), whose sum is σ = 2661398160. Its totient is φ = 1328207520.

The previous prime is 1994179939. The next prime is 1994179963. The reversal of 1994179947 is 7499714991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1994179947 - 2³ = 1994179939 is a prime.

It is a super-3 number, since 3×1994179947³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1994179907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307704 + ... + 314117.

It is an arithmetic number, because the mean of its divisors is an integer number (332674770).

Almost surely, 2^1994179947 is an apocalyptic number.

1994179947 is a deficient number, since it is larger than the sum of its proper divisors (667218213).

1994179947 is a wasteful number, since it uses less digits than its factorization.

1994179947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622893.

The product of its digits is 5143824, while the sum is 60.

The square root of 1994179947 is about 44656.2419713079. The cubic root of 1994179947 is about 1258.6977279456.

The spelling of 1994179947 in words is "one billion, nine hundred ninety-four million, one hundred seventy-nine thousand, nine hundred forty-seven".