1038857509 has 4 divisors (see below), whose sum is σ = 1093534240. Its totient is φ = 984180780.

The previous prime is 1038857503. The next prime is 1038857531. The reversal of 1038857509 is 9057588301.

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 1038857509 - 2⁹ = 1038856997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1038857503) 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, 27338337 + ... + 27338374.

It is an arithmetic number, because the mean of its divisors is an integer number (273383560).

Almost surely, 2^1038857509 is an apocalyptic number.

1038857509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1038857509 is a deficient number, since it is larger than the sum of its proper divisors (54676731).

1038857509 is an equidigital number, since it uses as much as digits as its factorization.

1038857509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54676730.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 1038857509 is about 32231.3125547192. The cubic root of 1038857509 is about 1012.7882661197.

The spelling of 1038857509 in words is "one billion, thirty-eight million, eight hundred fifty-seven thousand, five hundred nine".