1630983809 has 16 divisors (see below), whose sum is σ = 2076587520. Its totient is φ = 1245948480.

The previous prime is 1630983733. The next prime is 1630983821. The reversal of 1630983809 is 9083890361.

It is a de Polignac number, because none of the positive numbers 2^k-1630983809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630983839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306377 + ... + 311654.

It is an arithmetic number, because the mean of its divisors is an integer number (129786720).

Almost surely, 2^1630983809 is an apocalyptic number.

It is an amenable number.

1630983809 is a deficient number, since it is larger than the sum of its proper divisors (445603711).

1630983809 is a wasteful number, since it uses less digits than its factorization.

1630983809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618080.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 1630983809 is about 40385.4405572107. The cubic root of 1630983809 is about 1177.1086467110.

The spelling of 1630983809 in words is "one billion, six hundred thirty million, nine hundred eighty-three thousand, eight hundred nine".