1649797983 has 8 divisors (see below), whose sum is σ = 2444145200. Its totient is φ = 1099865304.

The previous prime is 1649797957. The next prime is 1649797999. The reversal of 1649797983 is 3897979461.

It is not a de Polignac number, because 1649797983 - 2⁵ = 1649797951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649797983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649797913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30551788 + ... + 30551841.

It is an arithmetic number, because the mean of its divisors is an integer number (305518150).

Almost surely, 2^1649797983 is an apocalyptic number.

1649797983 is a deficient number, since it is larger than the sum of its proper divisors (794347217).

1649797983 is an equidigital number, since it uses as much as digits as its factorization.

1649797983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61103638 (or 61103632 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The square root of 1649797983 is about 40617.7052896886. The cubic root of 1649797983 is about 1181.6175229295.

The spelling of 1649797983 in words is "one billion, six hundred forty-nine million, seven hundred ninety-seven thousand, nine hundred eighty-three".