423467987 has 2 divisors, whose sum is σ = 423467988. Its totient is φ = 423467986.

The previous prime is 423467981. The next prime is 423468007. The reversal of 423467987 is 789764324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423467987 - 2⁴ = 423467971 is a prime.

It is not a weakly prime, because it can be changed into another prime (423467981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211733993 + 211733994.

It is an arithmetic number, because the mean of its divisors is an integer number (211733994).

Almost surely, 2^423467987 is an apocalyptic number.

423467987 is a deficient number, since it is larger than the sum of its proper divisors (1).

423467987 is an equidigital number, since it uses as much as digits as its factorization.

423467987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The square root of 423467987 is about 20578.3378094539. The cubic root of 423467987 is about 750.9428066206.

The spelling of 423467987 in words is "four hundred twenty-three million, four hundred sixty-seven thousand, nine hundred eighty-seven".