3981156341 has 2 divisors, whose sum is σ = 3981156342. Its totient is φ = 3981156340.

The previous prime is 3981156313. The next prime is 3981156343. The reversal of 3981156341 is 1436511893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3946980625 + 34175716 = 62825^2 + 5846^2 .

It is an emirp because it is prime and its reverse (1436511893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3981156341 - 2¹⁴ = 3981139957 is a prime.

It is a super-2 number, since 2×3981156341² = 31699211622969016562, which contains 22 as substring.

Together with 3981156343, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3981156343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990578170 + 1990578171.

It is an arithmetic number, because the mean of its divisors is an integer number (1990578171).

Almost surely, 2^3981156341 is an apocalyptic number.

It is an amenable number.

3981156341 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981156341 is an equidigital number, since it uses as much as digits as its factorization.

3981156341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 3981156341 is about 63096.4051353165. The cubic root of 3981156341 is about 1584.9044237100.

The spelling of 3981156341 in words is "three billion, nine hundred eighty-one million, one hundred fifty-six thousand, three hundred forty-one".