3865872053 has 4 divisors (see below), whose sum is σ = 3871146828. Its totient is φ = 3860597280.

The previous prime is 3865872037. The next prime is 3865872079. The reversal of 3865872053 is 3502785683.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3502785683 = 139 ⋅25199897.

It can be written as a sum of positive squares in 2 ways, for example, as 2492206084 + 1373665969 = 49922^2 + 37063^2 .

It is a cyclic number.

It is not a de Polignac number, because 3865872053 - 2⁴ = 3865872037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3865871989 and 3865872007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865872553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2636288 + ... + 2637753.

It is an arithmetic number, because the mean of its divisors is an integer number (967786707).

Almost surely, 2^3865872053 is an apocalyptic number.

It is an amenable number.

3865872053 is a deficient number, since it is larger than the sum of its proper divisors (5274775).

3865872053 is an equidigital number, since it uses as much as digits as its factorization.

3865872053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5274774.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The square root of 3865872053 is about 62176.1373277562. The cubic root of 3865872053 is about 1569.4560508963.

The spelling of 3865872053 in words is "three billion, eight hundred sixty-five million, eight hundred seventy-two thousand, fifty-three".