1973395994 has 16 divisors (see below), whose sum is σ = 3010126536. Its totient is φ = 970036800.

The previous prime is 1973395981. The next prime is 1973395997. The reversal of 1973395994 is 4995933791.

It can be written as a sum of positive squares in 4 ways, for example, as 896703025 + 1076692969 = 29945^2 + 32813^2 .

It is not an unprimeable number, because it can be changed into a prime (1973395997) 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 7 ways as a sum of consecutive naturals, for example, 434624 + ... + 439140.

Almost surely, 2^1973395994 is an apocalyptic number.

1973395994 is a deficient number, since it is larger than the sum of its proper divisors (1036730542).

1973395994 is a wasteful number, since it uses less digits than its factorization.

1973395994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161.

The product of its digits is 8266860, while the sum is 59.

The square root of 1973395994 is about 44422.9219435192. The cubic root of 1973395994 is about 1254.3096034988.

The spelling of 1973395994 in words is "one billion, nine hundred seventy-three million, three hundred ninety-five thousand, nine hundred ninety-four".