3947852131 has 4 divisors (see below), whose sum is σ = 3954109264. Its totient is φ = 3941595000.

The previous prime is 3947852119. The next prime is 3947852173. The reversal of 3947852131 is 1312587493.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3947852131 - 2²¹ = 3945754979 is a prime.

It is a super-2 number, since 2×3947852131² = 31171072896482482322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3947856131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3127620 + ... + 3128881.

It is an arithmetic number, because the mean of its divisors is an integer number (988527316).

Almost surely, 2^3947852131 is an apocalyptic number.

3947852131 is a deficient number, since it is larger than the sum of its proper divisors (6257133).

3947852131 is an equidigital number, since it uses as much as digits as its factorization.

3947852131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257132.

The product of its digits is 181440, while the sum is 43.

The square root of 3947852131 is about 62831.9355980699. The cubic root of 3947852131 is about 1580.4725568025.

The spelling of 3947852131 in words is "three billion, nine hundred forty-seven million, eight hundred fifty-two thousand, one hundred thirty-one".