815428423 has 2 divisors, whose sum is σ = 815428424. Its totient is φ = 815428422.

The previous prime is 815428403. The next prime is 815428429. The reversal of 815428423 is 324824518.

It is a happy number.

815428423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 815428423 - 2⁹ = 815427911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815428429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407714211 + 407714212.

It is an arithmetic number, because the mean of its divisors is an integer number (407714212).

Almost surely, 2^815428423 is an apocalyptic number.

815428423 is a deficient number, since it is larger than the sum of its proper divisors (1).

815428423 is an equidigital number, since it uses as much as digits as its factorization.

815428423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 37.

The square root of 815428423 is about 28555.7073629774. The cubic root of 815428423 is about 934.2475087895.

The spelling of 815428423 in words is "eight hundred fifteen million, four hundred twenty-eight thousand, four hundred twenty-three".