3947131 has 2 divisors, whose sum is σ = 3947132. Its totient is φ = 3947130.

The previous prime is 3947113. The next prime is 3947143. The reversal of 3947131 is 1317493.

Together with previous prime (3947113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (1317493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3947131 - 2¹³ = 3938939 is a prime.

It is a super-2 number, since 2×3947131² = 31159686262322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3947131.

It is not a weakly prime, because it can be changed into another prime (3947101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973565 + 1973566.

It is an arithmetic number, because the mean of its divisors is an integer number (1973566).

Almost surely, 2^3947131 is an apocalyptic number.

3947131 is a deficient number, since it is larger than the sum of its proper divisors (1).

3947131 is an equidigital number, since it uses as much as digits as its factorization.

3947131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 3947131 is about 1986.7387850445. The cubic root of 3947131 is about 158.0376319058.

The spelling of 3947131 in words is "three million, nine hundred forty-seven thousand, one hundred thirty-one".