1538921039 has 8 divisors (see below), whose sum is σ = 1631682000. Its totient is φ = 1446408576.

The previous prime is 1538921029. The next prime is 1538921077. The reversal of 1538921039 is 9301298351.

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 1538921039 - 2²⁴ = 1522143823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1538920987 and 1538921005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538921029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49289 + ... + 74210.

It is an arithmetic number, because the mean of its divisors is an integer number (203960250).

Almost surely, 2^1538921039 is an apocalyptic number.

1538921039 is a deficient number, since it is larger than the sum of its proper divisors (92760961).

1538921039 is a wasteful number, since it uses less digits than its factorization.

1538921039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124249.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1538921039 is about 39229.0840958593. The cubic root of 1538921039 is about 1154.5305936589.

The spelling of 1538921039 in words is "one billion, five hundred thirty-eight million, nine hundred twenty-one thousand, thirty-nine".