3977549 has 2 divisors, whose sum is σ = 3977550. Its totient is φ = 3977548.

The previous prime is 3977527. The next prime is 3977569. The reversal of 3977549 is 9457793.

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., 2941225 + 1036324 = 1715^2 + 1018^2 .

It is a cyclic number.

It is not a de Polignac number, because 3977549 - 2⁸ = 3977293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3977509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1988774 + 1988775.

It is an arithmetic number, because the mean of its divisors is an integer number (1988775).

Almost surely, 2^3977549 is an apocalyptic number.

It is an amenable number.

3977549 is a deficient number, since it is larger than the sum of its proper divisors (1).

3977549 is an equidigital number, since it uses as much as digits as its factorization.

3977549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 238140, while the sum is 44.

The square root of 3977549 is about 1994.3793520792. The cubic root of 3977549 is about 158.4425583066.

The spelling of 3977549 in words is "three million, nine hundred seventy-seven thousand, five hundred forty-nine".