423169445 has 4 divisors (see below), whose sum is σ = 507803340. Its totient is φ = 338535552.

The previous prime is 423169399. The next prime is 423169447. The reversal of 423169445 is 544961324.

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 179372449 + 243796996 = 13393^2 + 15614^2 .

It is a cyclic number.

It is not a de Polignac number, because 423169445 - 2⁶ = 423169381 is a prime.

It is a super-3 number, since 3×423169445³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423169399 and 423169408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423169447) 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, 42316940 + ... + 42316949.

It is an arithmetic number, because the mean of its divisors is an integer number (126950835).

Almost surely, 2^423169445 is an apocalyptic number.

It is an amenable number.

423169445 is a deficient number, since it is larger than the sum of its proper divisors (84633895).

423169445 is an equidigital number, since it uses as much as digits as its factorization.

423169445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84633894.

The product of its digits is 103680, while the sum is 38.

The square root of 423169445 is about 20571.0827376684. The cubic root of 423169445 is about 750.7662953072.

The spelling of 423169445 in words is "four hundred twenty-three million, one hundred sixty-nine thousand, four hundred forty-five".