3977489 has 2 divisors, whose sum is σ = 3977490. Its totient is φ = 3977488.

The previous prime is 3977483. The next prime is 3977497. The reversal of 3977489 is 9847793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2496400 + 1481089 = 1580^2 + 1217^2 .

It is an emirp because it is prime and its reverse (9847793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3977489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3977483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1988744 + 1988745.

It is an arithmetic number, because the mean of its divisors is an integer number (1988745).

Almost surely, 2^3977489 is an apocalyptic number.

It is an amenable number.

3977489 is a deficient number, since it is larger than the sum of its proper divisors (1).

3977489 is an equidigital number, since it uses as much as digits as its factorization.

3977489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 3977489 is about 1994.3643097488. The cubic root of 3977489 is about 158.4417616182.

The spelling of 3977489 in words is "three million, nine hundred seventy-seven thousand, four hundred eighty-nine".