1538609983 has 4 divisors (see below), whose sum is σ = 1553548048. Its totient is φ = 1523671920.

The previous prime is 1538609899. The next prime is 1538610049. The reversal of 1538609983 is 3899068351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1538609983 - 2¹⁷ = 1538478911 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 1538609983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538609183) 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, 7468878 + ... + 7469083.

It is an arithmetic number, because the mean of its divisors is an integer number (388387012).

Almost surely, 2^1538609983 is an apocalyptic number.

1538609983 is a deficient number, since it is larger than the sum of its proper divisors (14938065).

1538609983 is a wasteful number, since it uses less digits than its factorization.

1538609983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14938064.

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 1538609983 is about 39225.1192859882. The cubic root of 1538609983 is about 1154.4528015222.

The spelling of 1538609983 in words is "one billion, five hundred thirty-eight million, six hundred nine thousand, nine hundred eighty-three".