1983123700 has 18 divisors (see below), whose sum is σ = 4303378646. Its totient is φ = 793249440.

The previous prime is 1983123691. The next prime is 1983123713. The reversal of 1983123700 is 73213891.

It can be written as a sum of positive squares in 3 ways, for example, as 632120164 + 1351003536 = 25142^2 + 36756^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9915519 + ... + 9915718.

Almost surely, 2^1983123700 is an apocalyptic number.

1983123700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1983123700 is an abundant number, since it is smaller than the sum of its proper divisors (2320254946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1983123700 is a wasteful number, since it uses less digits than its factorization.

1983123700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19831251 (or 19831244 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1983123700 is about 44532.2770583315. The cubic root of 1983123700 is about 1256.3672342595.

The spelling of 1983123700 in words is "one billion, nine hundred eighty-three million, one hundred twenty-three thousand, seven hundred".