1538475899 has 4 divisors (see below), whose sum is σ = 1539459264. Its totient is φ = 1537492536.

The previous prime is 1538475859. The next prime is 1538475919. The reversal of 1538475899 is 9985748351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9985748351 = 281 ⋅35536471.

It is a cyclic number.

It is not a de Polignac number, because 1538475899 - 2²⁴ = 1521698683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1538475859) 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, 489332 + ... + 492465.

It is an arithmetic number, because the mean of its divisors is an integer number (384864816).

Almost surely, 2^1538475899 is an apocalyptic number.

1538475899 is a deficient number, since it is larger than the sum of its proper divisors (983365).

1538475899 is an equidigital number, since it uses as much as digits as its factorization.

1538475899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983364.

The product of its digits is 10886400, while the sum is 59.

The square root of 1538475899 is about 39223.4100888742. The cubic root of 1538475899 is about 1154.4192651598.

The spelling of 1538475899 in words is "one billion, five hundred thirty-eight million, four hundred seventy-five thousand, eight hundred ninety-nine".