7438891 has 2 divisors, whose sum is σ = 7438892. Its totient is φ = 7438890.

The previous prime is 7438841. The next prime is 7438901. The reversal of 7438891 is 1988347.

It is a strong prime.

It is an emirp because it is prime and its reverse (1988347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7438891 - 2¹⁷ = 7307819 is a prime.

It is not a weakly prime, because it can be changed into another prime (7438801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3719445 + 3719446.

It is an arithmetic number, because the mean of its divisors is an integer number (3719446).

Almost surely, 2^7438891 is an apocalyptic number.

7438891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7438891 is an equidigital number, since it uses as much as digits as its factorization.

7438891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 7438891 is about 2727.4330422579. The cubic root of 7438891 is about 195.2103012765.

The spelling of 7438891 in words is "seven million, four hundred thirty-eight thousand, eight hundred ninety-one".