453945685 has 4 divisors (see below), whose sum is σ = 544734828. Its totient is φ = 363156544.

The previous prime is 453945677. The next prime is 453945691. The reversal of 453945685 is 586549354.

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 163277284 + 290668401 = 12778^2 + 17049^2 .

It is a cyclic number.

It is not a de Polignac number, because 453945685 - 2³ = 453945677 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 45394564 + ... + 45394573.

It is an arithmetic number, because the mean of its divisors is an integer number (136183707).

Almost surely, 2^453945685 is an apocalyptic number.

It is an amenable number.

453945685 is a deficient number, since it is larger than the sum of its proper divisors (90789143).

453945685 is an equidigital number, since it uses as much as digits as its factorization.

453945685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90789142.

The product of its digits is 2592000, while the sum is 49.

The square root of 453945685 is about 21306.0011499108. The cubic root of 453945685 is about 768.5426332970.

Subtracting from 453945685 its sum of digits (49), we obtain a square (453945636 = 21306²).

The spelling of 453945685 in words is "four hundred fifty-three million, nine hundred forty-five thousand, six hundred eighty-five".