1538938329 has 4 divisors (see below), whose sum is σ = 2051917776. Its totient is φ = 1025958884.

The previous prime is 1538938327. The next prime is 1538938337. The reversal of 1538938329 is 9238398351.

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.

It is a cyclic number.

It is not a de Polignac number, because 1538938329 - 2¹ = 1538938327 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1538938327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256489719 + ... + 256489724.

It is an arithmetic number, because the mean of its divisors is an integer number (512979444).

Almost surely, 2^1538938329 is an apocalyptic number.

It is an amenable number.

1538938329 is a deficient number, since it is larger than the sum of its proper divisors (512979447).

1538938329 is an equidigital number, since it uses as much as digits as its factorization.

1538938329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512979446.

The product of its digits is 1399680, while the sum is 51.

The square root of 1538938329 is about 39229.3044674514. The cubic root of 1538938329 is about 1154.5349174153.

The spelling of 1538938329 in words is "one billion, five hundred thirty-eight million, nine hundred thirty-eight thousand, three hundred twenty-nine".