1999773958 has 48 divisors (see below), whose sum is σ = 3723274080. Its totient is φ = 788755968.

The previous prime is 1999773949. The next prime is 1999774003. The reversal of 1999773958 is 8593779991.

It is a junction number, because it is equal to n+sod(n) for n = 1999773893 and 1999773902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 938238 + ... + 940366.

It is an arithmetic number, because the mean of its divisors is an integer number (77568210).

Almost surely, 2^1999773958 is an apocalyptic number.

1999773958 is a deficient number, since it is larger than the sum of its proper divisors (1723500122).

1999773958 is a wasteful number, since it uses less digits than its factorization.

1999773958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561 (or 2548 counting only the distinct ones).

The product of its digits is 38578680, while the sum is 67.

The square root of 1999773958 is about 44718.8322521955. The cubic root of 1999773958 is about 1259.8735822609.

The spelling of 1999773958 in words is "one billion, nine hundred ninety-nine million, seven hundred seventy-three thousand, nine hundred fifty-eight".