1038391 has 2 divisors, whose sum is σ = 1038392. Its totient is φ = 1038390.

The previous prime is 1038383. The next prime is 1038409. The reversal of 1038391 is 1938301.

It is a weak prime.

It is an emirp because it is prime and its reverse (1938301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1038391 - 2³ = 1038383 is a prime.

It is an Ulam number.

1038391 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1038311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519195 + 519196.

It is an arithmetic number, because the mean of its divisors is an integer number (519196).

2^1038391 is an apocalyptic number.

1038391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1038391 is an equidigital number, since it uses as much as digits as its factorization.

1038391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1038391 is about 1019.0147202077. The cubic root of 1038391 is about 101.2636642637.

The spelling of 1038391 in words is "one million, thirty-eight thousand, three hundred ninety-one".