3918971 has 6 divisors (see below), whose sum is σ = 4558860. Its totient is φ = 3359076.

The previous prime is 3918949. The next prime is 3918983. The reversal of 3918971 is 1798193.

It is not a de Polignac number, because 3918971 - 2¹⁸ = 3656827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3918071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39941 + ... + 40038.

It is an arithmetic number, because the mean of its divisors is an integer number (759810).

Almost surely, 2^3918971 is an apocalyptic number.

3918971 is a deficient number, since it is larger than the sum of its proper divisors (639889).

3918971 is an equidigital number, since it uses as much as digits as its factorization.

3918971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79993 (or 79986 counting only the distinct ones).

The product of its digits is 13608, while the sum is 38.

The square root of 3918971 is about 1979.6391085246. The cubic root of 3918971 is about 157.6609055182.

The spelling of 3918971 in words is "three million, nine hundred eighteen thousand, nine hundred seventy-one".