423425645 has 4 divisors (see below), whose sum is σ = 508110780. Its totient is φ = 338740512.

The previous prime is 423425627. The next prime is 423425657. The reversal of 423425645 is 546524324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 134629609 + 288796036 = 11603^2 + 16994^2 .

It is a cyclic number.

It is not a de Polignac number, because 423425645 - 2¹² = 423421549 is a prime.

It is a super-3 number, since 3×423425645³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42342560 + ... + 42342569.

It is an arithmetic number, because the mean of its divisors is an integer number (127027695).

Almost surely, 2^423425645 is an apocalyptic number.

It is an amenable number.

423425645 is a deficient number, since it is larger than the sum of its proper divisors (84685135).

423425645 is an equidigital number, since it uses as much as digits as its factorization.

423425645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84685134.

The product of its digits is 115200, while the sum is 35.

The square root of 423425645 is about 20577.3089834410. The cubic root of 423425645 is about 750.9177771960.

Adding to 423425645 its reverse (546524324), we get a palindrome (969949969).

The spelling of 423425645 in words is "four hundred twenty-three million, four hundred twenty-five thousand, six hundred forty-five".