7855423 has 2 divisors, whose sum is σ = 7855424. Its totient is φ = 7855422.

The previous prime is 7855403. The next prime is 7855427. The reversal of 7855423 is 3245587.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3245587) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7855423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7855427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927711 + 3927712.

It is an arithmetic number, because the mean of its divisors is an integer number (3927712).

Almost surely, 2^7855423 is an apocalyptic number.

7855423 is a deficient number, since it is larger than the sum of its proper divisors (1).

7855423 is an equidigital number, since it uses as much as digits as its factorization.

7855423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 7855423 is about 2802.7527539903. The cubic root of 7855423 is about 198.7878600924.

The spelling of 7855423 in words is "seven million, eight hundred fifty-five thousand, four hundred twenty-three".