1038668399 has 4 divisors (see below), whose sum is σ = 1039659600. Its totient is φ = 1037677200.

The previous prime is 1038668387. The next prime is 1038668417. The reversal of 1038668399 is 9938668301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1038668399 - 2²⁸ = 770232943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1038668399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1038668599) 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, 494027 + ... + 496124.

It is an arithmetic number, because the mean of its divisors is an integer number (259914900).

Almost surely, 2^1038668399 is an apocalyptic number.

1038668399 is a deficient number, since it is larger than the sum of its proper divisors (991201).

1038668399 is an equidigital number, since it uses as much as digits as its factorization.

1038668399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991200.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 1038668399 is about 32228.3787833021. The cubic root of 1038668399 is about 1012.7268075750.

The spelling of 1038668399 in words is "one billion, thirty-eight million, six hundred sixty-eight thousand, three hundred ninety-nine".