1973987836 has 12 divisors (see below), whose sum is σ = 3455723880. Its totient is φ = 986638160.

The previous prime is 1973987831. The next prime is 1973987867. The reversal of 1973987836 is 6387893791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1973987831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76255 + ... + 98806.

It is an arithmetic number, because the mean of its divisors is an integer number (287976990).

Almost surely, 2^1973987836 is an apocalyptic number.

It is an amenable number.

1973987836 is a deficient number, since it is larger than the sum of its proper divisors (1481736044).

1973987836 is a wasteful number, since it uses less digits than its factorization.

1973987836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177884 (or 177882 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 61.

The square root of 1973987836 is about 44429.5828924828. The cubic root of 1973987836 is about 1254.4349844674.

The spelling of 1973987836 in words is "one billion, nine hundred seventy-three million, nine hundred eighty-seven thousand, eight hundred thirty-six".