1564983149 has 4 divisors (see below), whose sum is σ = 1565063136. Its totient is φ = 1564903164.

The previous prime is 1564983143. The next prime is 1564983157. The reversal of 1564983149 is 9413894651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1564983149 - 2²⁰ = 1563934573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1564983097 and 1564983106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564983143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11192 + ... + 57054.

It is an arithmetic number, because the mean of its divisors is an integer number (391265784).

Almost surely, 2^1564983149 is an apocalyptic number.

It is an amenable number.

1564983149 is a deficient number, since it is larger than the sum of its proper divisors (79987).

1564983149 is an equidigital number, since it uses as much as digits as its factorization.

1564983149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79986.

The product of its digits is 933120, while the sum is 50.

The square root of 1564983149 is about 39559.8679092840. The cubic root of 1564983149 is about 1161.0115900789.

The spelling of 1564983149 in words is "one billion, five hundred sixty-four million, nine hundred eighty-three thousand, one hundred forty-nine".