1000388139 has 8 divisors (see below), whose sum is σ = 1350735360. Its totient is φ = 658483176.

The previous prime is 1000388119. The next prime is 1000388141. The reversal of 1000388139 is 9318830001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1000388139 - 2¹⁵ = 1000355371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1000388119) 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, 2110287 + ... + 2110760.

It is an arithmetic number, because the mean of its divisors is an integer number (168841920).

Almost surely, 2^1000388139 is an apocalyptic number.

1000388139 is a deficient number, since it is larger than the sum of its proper divisors (350347221).

1000388139 is an equidigital number, since it uses as much as digits as its factorization.

1000388139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221129.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1000388139 is about 31628.9130227392. The cubic root of 1000388139 is about 1000.1293629312.

The spelling of 1000388139 in words is "one billion, three hundred eighty-eight thousand, one hundred thirty-nine".