3987171053 has 4 divisors (see below), whose sum is σ = 4124659740. Its totient is φ = 3849682368.

The previous prime is 3987171047. The next prime is 3987171073. The reversal of 3987171053 is 3501717893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3501717893 = 941 ⋅3721273.

It can be written as a sum of positive squares in 2 ways, for example, as 3391664644 + 595506409 = 58238^2 + 24403^2 .

It is a cyclic number.

It is not a de Polignac number, because 3987171053 - 2⁴ = 3987171037 is a prime.

It is a super-2 number, since 2×3987171053² = 31795066011762257618, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3987170995 and 3987171013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987171073) 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, 68744300 + ... + 68744357.

It is an arithmetic number, because the mean of its divisors is an integer number (1031164935).

Almost surely, 2^3987171053 is an apocalyptic number.

It is an amenable number.

3987171053 is a deficient number, since it is larger than the sum of its proper divisors (137488687).

3987171053 is a wasteful number, since it uses less digits than its factorization.

3987171053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137488686.

The product of its (nonzero) digits is 158760, while the sum is 44.

The square root of 3987171053 is about 63144.0500205681. The cubic root of 3987171053 is about 1585.7021774438.

The spelling of 3987171053 in words is "three billion, nine hundred eighty-seven million, one hundred seventy-one thousand, fifty-three".