1973982209 has 8 divisors (see below), whose sum is σ = 2035799040. Its totient is φ = 1912888656.

The previous prime is 1973982203. The next prime is 1973982211. The reversal of 1973982209 is 9022893791.

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

It is a cyclic number.

It is not a de Polignac number, because 1973982209 - 2⁴ = 1973982193 is a prime.

It is a super-2 number, since 2×1973982209² = 7793211522897039362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1973982203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175274 + ... + 186195.

It is an arithmetic number, because the mean of its divisors is an integer number (254474880).

Almost surely, 2^1973982209 is an apocalyptic number.

It is an amenable number.

1973982209 is a deficient number, since it is larger than the sum of its proper divisors (61816831).

1973982209 is a wasteful number, since it uses less digits than its factorization.

1973982209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361639.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 1973982209 is about 44429.5195675128. The cubic root of 1973982209 is about 1254.4337925127.

The spelling of 1973982209 in words is "one billion, nine hundred seventy-three million, nine hundred eighty-two thousand, two hundred nine".