1997946794 has 16 divisors (see below), whose sum is σ = 3258974088. Its totient is φ = 914798592.

The previous prime is 1997946791. The next prime is 1997946799. The reversal of 1997946794 is 4976497991.

It can be written as a sum of positive squares in 4 ways, for example, as 1971804025 + 26142769 = 44405^2 + 5113^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1997946794.

It is not an unprimeable number, because it can be changed into a prime (1997946791) 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, 792839 + ... + 795354.

Almost surely, 2^1997946794 is an apocalyptic number.

1997946794 is a deficient number, since it is larger than the sum of its proper divisors (1261027294).

1997946794 is a wasteful number, since it uses less digits than its factorization.

1997946794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588249.

The product of its digits is 30862944, while the sum is 65.

The square root of 1997946794 is about 44698.3981144739. The cubic root of 1997946794 is about 1259.4897560288.

The spelling of 1997946794 in words is "one billion, nine hundred ninety-seven million, nine hundred forty-six thousand, seven hundred ninety-four".