1683949939 has 8 divisors (see below), whose sum is σ = 1928344320. Its totient is φ = 1440513096.

The previous prime is 1683949921. The next prime is 1683949951. The reversal of 1683949939 is 9399493861.

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 1683949939 - 2⁵ = 1683949907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1683949919) 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, 235609 + ... + 242650.

It is an arithmetic number, because the mean of its divisors is an integer number (241043040).

Almost surely, 2^1683949939 is an apocalyptic number.

1683949939 is a deficient number, since it is larger than the sum of its proper divisors (244394381).

1683949939 is an equidigital number, since it uses as much as digits as its factorization.

1683949939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478769.

The product of its digits is 11337408, while the sum is 61.

The square root of 1683949939 is about 41035.9590968701. The cubic root of 1683949939 is about 1189.7153331279.

The spelling of 1683949939 in words is "one billion, six hundred eighty-three million, nine hundred forty-nine thousand, nine hundred thirty-nine".