1538314891 has 8 divisors (see below), whose sum is σ = 1589511168. Its totient is φ = 1487217000.

The previous prime is 1538314873. The next prime is 1538314901. The reversal of 1538314891 is 1984138351.

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 1538314891 - 2⁷ = 1538314763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538314801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7896 + ... + 56026.

It is an arithmetic number, because the mean of its divisors is an integer number (198688896).

Almost surely, 2^1538314891 is an apocalyptic number.

1538314891 is a deficient number, since it is larger than the sum of its proper divisors (51196277).

1538314891 is a wasteful number, since it uses less digits than its factorization.

1538314891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49193.

The product of its digits is 103680, while the sum is 43.

The square root of 1538314891 is about 39221.3575874166. The cubic root of 1538314891 is about 1154.3789921377.

The spelling of 1538314891 in words is "one billion, five hundred thirty-eight million, three hundred fourteen thousand, eight hundred ninety-one".