1838791 has 2 divisors, whose sum is σ = 1838792. Its totient is φ = 1838790.

The previous prime is 1838773. The next prime is 1838807. The reversal of 1838791 is 1978381.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1838791 - 2¹³ = 1830599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1838791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919395 + 919396.

It is an arithmetic number, because the mean of its divisors is an integer number (919396).

2^1838791 is an apocalyptic number.

1838791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838791 is an equidigital number, since it uses as much as digits as its factorization.

1838791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 37.

The square root of 1838791 is about 1356.0202800843. The cubic root of 1838791 is about 122.5116690258.

It can be divided in two parts, 18 and 38791, that added together give a square (38809 = 197²).

The spelling of 1838791 in words is "one million, eight hundred thirty-eight thousand, seven hundred ninety-one".