3971977 has 2 divisors, whose sum is σ = 3971978. Its totient is φ = 3971976.

The previous prime is 3971963. The next prime is 3971983. The reversal of 3971977 is 7791793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3936256 + 35721 = 1984^2 + 189^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971977 - 2¹⁵ = 3939209 is a prime.

It is not a weakly prime, because it can be changed into another prime (3971917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985988 + 1985989.

It is an arithmetic number, because the mean of its divisors is an integer number (1985989).

Almost surely, 2^3971977 is an apocalyptic number.

It is an amenable number.

3971977 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971977 is an equidigital number, since it uses as much as digits as its factorization.

3971977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83349, while the sum is 43.

The square root of 3971977 is about 1992.9819366969. The cubic root of 3971977 is about 158.3685383090.

The spelling of 3971977 in words is "three million, nine hundred seventy-one thousand, nine hundred seventy-seven".