1683640955 has 8 divisors (see below), whose sum is σ = 2020589712. Its totient is φ = 1346765728.

The previous prime is 1683640927. The next prime is 1683640967. The reversal of 1683640955 is 5590463861.

It is a happy number.

1683640955 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 1683640955 - 2¹² = 1683636859 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76952 + ... + 96378.

It is an arithmetic number, because the mean of its divisors is an integer number (252573714).

Almost surely, 2^1683640955 is an apocalyptic number.

1683640955 is a deficient number, since it is larger than the sum of its proper divisors (336948757).

1683640955 is a wasteful number, since it uses less digits than its factorization.

1683640955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36765.

The product of its (nonzero) digits is 777600, while the sum is 47.

The square root of 1683640955 is about 41032.1941285133. The cubic root of 1683640955 is about 1189.6425626574.

The spelling of 1683640955 in words is "one billion, six hundred eighty-three million, six hundred forty thousand, nine hundred fifty-five".