7891423 has 2 divisors, whose sum is σ = 7891424. Its totient is φ = 7891422.

The previous prime is 7891421. The next prime is 7891439. The reversal of 7891423 is 3241987.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7891423 - 2¹ = 7891421 is a prime.

Together with 7891421, it forms a pair of twin primes.

It is equal to p₅₃₂₉₆₉ and since 7891423 and 532969 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7891421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3945711 + 3945712.

It is an arithmetic number, because the mean of its divisors is an integer number (3945712).

Almost surely, 2^7891423 is an apocalyptic number.

7891423 is a deficient number, since it is larger than the sum of its proper divisors (1).

7891423 is an equidigital number, since it uses as much as digits as its factorization.

7891423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 7891423 is about 2809.1676703251. The cubic root of 7891423 is about 199.0910671295.

The spelling of 7891423 in words is "seven million, eight hundred ninety-one thousand, four hundred twenty-three".