423445507 has 2 divisors, whose sum is σ = 423445508. Its totient is φ = 423445506.

The previous prime is 423445487. The next prime is 423445531. The reversal of 423445507 is 705544324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423445507 is a prime.

It is not a weakly prime, because it can be changed into another prime (423445597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211722753 + 211722754.

It is an arithmetic number, because the mean of its divisors is an integer number (211722754).

Almost surely, 2^423445507 is an apocalyptic number.

423445507 is a deficient number, since it is larger than the sum of its proper divisors (1).

423445507 is an equidigital number, since it uses as much as digits as its factorization.

423445507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 34.

The square root of 423445507 is about 20577.7915967676. The cubic root of 423445507 is about 750.9295183331.

The spelling of 423445507 in words is "four hundred twenty-three million, four hundred forty-five thousand, five hundred seven".