1973321998 has 8 divisors (see below), whose sum is σ = 2988721008. Its totient is φ = 977081664.

The previous prime is 1973321963. The next prime is 1973322017. The reversal of 1973321998 is 8991233791.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4789411 + ... + 4789822.

It is an arithmetic number, because the mean of its divisors is an integer number (373590126).

Almost surely, 2^1973321998 is an apocalyptic number.

1973321998 is a deficient number, since it is larger than the sum of its proper divisors (1015399010).

1973321998 is a wasteful number, since it uses less digits than its factorization.

1973321998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579338.

The product of its digits is 734832, while the sum is 52.

The square root of 1973321998 is about 44422.0890773948. The cubic root of 1973321998 is about 1254.2939257781.

The spelling of 1973321998 in words is "one billion, nine hundred seventy-three million, three hundred twenty-one thousand, nine hundred ninety-eight".