452608781 has 4 divisors (see below), whose sum is σ = 455109564. Its totient is φ = 450108000.

The previous prime is 452608769. The next prime is 452608787. The reversal of 452608781 is 187806254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187806254 = 2 ⋅93903127.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 444577225 = 2834^2 + 21085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-452608781 is a prime.

It is a super-2 number, since 2×452608781² = 409709417276611922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (452608787) 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, 1250120 + ... + 1250481.

It is an arithmetic number, because the mean of its divisors is an integer number (113777391).

Almost surely, 2^452608781 is an apocalyptic number.

It is an amenable number.

452608781 is a deficient number, since it is larger than the sum of its proper divisors (2500783).

452608781 is a wasteful number, since it uses less digits than its factorization.

452608781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500782.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 452608781 is about 21274.6041326272. The cubic root of 452608781 is about 767.7874195754.

The spelling of 452608781 in words is "four hundred fifty-two million, six hundred eight thousand, seven hundred eighty-one".