423318787 has 4 divisors (see below), whose sum is σ = 423373696. Its totient is φ = 423263880.

The previous prime is 423318769. The next prime is 423318823. The reversal of 423318787 is 787813324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423318787 - 2¹¹ = 423316739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423318487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13539 + ... + 32092.

It is an arithmetic number, because the mean of its divisors is an integer number (105843424).

Almost surely, 2^423318787 is an apocalyptic number.

423318787 is a deficient number, since it is larger than the sum of its proper divisors (54909).

423318787 is an equidigital number, since it uses as much as digits as its factorization.

423318787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54908.

The product of its digits is 225792, while the sum is 43.

The square root of 423318787 is about 20574.7123187665. The cubic root of 423318787 is about 750.8546033158.

The spelling of 423318787 in words is "four hundred twenty-three million, three hundred eighteen thousand, seven hundred eighty-seven".