423420909 has 32 divisors (see below), whose sum is σ = 634675200. Its totient is φ = 249842880.

The previous prime is 423420901. The next prime is 423420911. The reversal of 423420909 is 909024324.

It is not a de Polignac number, because 423420909 - 2³ = 423420901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423420909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423420901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47112 + ... + 55374.

It is an arithmetic number, because the mean of its divisors is an integer number (19833600).

Almost surely, 2^423420909 is an apocalyptic number.

It is an amenable number.

423420909 is a deficient number, since it is larger than the sum of its proper divisors (211254291).

423420909 is a wasteful number, since it uses less digits than its factorization.

423420909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8345.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 423420909 is about 20577.1939049036. The cubic root of 423420909 is about 750.9149775231.

The spelling of 423420909 in words is "four hundred twenty-three million, four hundred twenty thousand, nine hundred nine".