3854873681 has 4 divisors (see below), whose sum is σ = 3865377792. Its totient is φ = 3844369572.

The previous prime is 3854873639. The next prime is 3854873707. The reversal of 3854873681 is 1863784583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1863784583 = 32647 ⋅57089.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3854873681 is a prime.

It is a super-2 number, since 2×3854873681² = 29720102192932979522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3854873611) 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, 5251505 + ... + 5252238.

It is an arithmetic number, because the mean of its divisors is an integer number (966344448).

Almost surely, 2^3854873681 is an apocalyptic number.

It is an amenable number.

3854873681 is a deficient number, since it is larger than the sum of its proper divisors (10504111).

3854873681 is a wasteful number, since it uses less digits than its factorization.

3854873681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10504110.

The product of its digits is 3870720, while the sum is 53.

The square root of 3854873681 is about 62087.6290495941. The cubic root of 3854873681 is about 1567.9662743130.

The spelling of 3854873681 in words is "three billion, eight hundred fifty-four million, eight hundred seventy-three thousand, six hundred eighty-one".