434938681 has 4 divisors (see below), whose sum is σ = 435029364. Its totient is φ = 434848000.

The previous prime is 434938657. The next prime is 434938697. The reversal of 434938681 is 186839434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186839434 = 2 ⋅93419717.

It can be written as a sum of positive squares in 2 ways, for example, as 113955625 + 320983056 = 10675^2 + 17916^2 .

It is a cyclic number.

It is not a de Polignac number, because 434938681 - 2²¹ = 432841529 is a prime.

It is a super-2 number, since 2×434938681² = 378343312460039522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (434938631) 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, 37720 + ... + 47881.

It is an arithmetic number, because the mean of its divisors is an integer number (108757341).

Almost surely, 2^434938681 is an apocalyptic number.

It is an amenable number.

434938681 is a deficient number, since it is larger than the sum of its proper divisors (90683).

434938681 is an equidigital number, since it uses as much as digits as its factorization.

434938681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90682.

The product of its digits is 497664, while the sum is 46.

The square root of 434938681 is about 20855.1835522970. The cubic root of 434938681 is about 757.6628809555.

The spelling of 434938681 in words is "four hundred thirty-four million, nine hundred thirty-eight thousand, six hundred eighty-one".