1997803773 has 96 divisors (see below), whose sum is σ = 3795517440. Its totient is φ = 984752640.

The previous prime is 1997803763. The next prime is 1997803777. The reversal of 1997803773 is 3773087991.

It is a happy number.

1997803773 is a `hidden beast` number, since 199 + 7 + 80 + 377 + 3 = 666.

It is not a de Polignac number, because 1997803773 - 2⁹ = 1997803261 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997803777) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 629236 + ... + 632402.

It is an arithmetic number, because the mean of its divisors is an integer number (39536640).

Almost surely, 2^1997803773 is an apocalyptic number.

It is an amenable number.

1997803773 is a deficient number, since it is larger than the sum of its proper divisors (1797713667).

1997803773 is a wasteful number, since it uses less digits than its factorization.

1997803773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247 (or 3244 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The square root of 1997803773 is about 44696.7982410374. The cubic root of 1997803773 is about 1259.4597022117.

The spelling of 1997803773 in words is "one billion, nine hundred ninety-seven million, eight hundred three thousand, seven hundred seventy-three".