3977893 has 2 divisors, whose sum is σ = 3977894. Its totient is φ = 3977892.

The previous prime is 3977891. The next prime is 3977903. The reversal of 3977893 is 3987793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2122849 + 1855044 = 1457^2 + 1362^2 .

It is a cyclic number.

It is not a de Polignac number, because 3977893 - 2¹ = 3977891 is a prime.

Together with 3977891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3977891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1988946 + 1988947.

It is an arithmetic number, because the mean of its divisors is an integer number (1988947).

Almost surely, 2^3977893 is an apocalyptic number.

It is an amenable number.

3977893 is a deficient number, since it is larger than the sum of its proper divisors (1).

3977893 is an equidigital number, since it uses as much as digits as its factorization.

3977893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 3977893 is about 1994.4655925836. The cubic root of 3977893 is about 158.4471258321.

The spelling of 3977893 in words is "three million, nine hundred seventy-seven thousand, eight hundred ninety-three".