3978677 has 4 divisors (see below), whose sum is σ = 4029120. Its totient is φ = 3928236.

The previous prime is 3978673. The next prime is 3978683. The reversal of 3978677 is 7768793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7768793 = 53 ⋅146581.

It is a cyclic number.

It is not a de Polignac number, because 3978677 - 2² = 3978673 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25103 + ... + 25260.

It is an arithmetic number, because the mean of its divisors is an integer number (1007280).

Almost surely, 2^3978677 is an apocalyptic number.

It is an amenable number.

3978677 is a deficient number, since it is larger than the sum of its proper divisors (50443).

3978677 is an equidigital number, since it uses as much as digits as its factorization.

3978677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50442.

The product of its digits is 444528, while the sum is 47.

The square root of 3978677 is about 1994.6621267774. The cubic root of 3978677 is about 158.4575345574.

The spelling of 3978677 in words is "three million, nine hundred seventy-eight thousand, six hundred seventy-seven".