3978577 has 4 divisors (see below), whose sum is σ = 3982576. Its totient is φ = 3974580.

The previous prime is 3978553. The next prime is 3978587. The reversal of 3978577 is 7758793.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3978577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3978587) 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, 802 + ... + 2932.

It is an arithmetic number, because the mean of its divisors is an integer number (995644).

Almost surely, 2^3978577 is an apocalyptic number.

It is an amenable number.

3978577 is a deficient number, since it is larger than the sum of its proper divisors (3999).

3978577 is a wasteful number, since it uses less digits than its factorization.

3978577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998.

The product of its digits is 370440, while the sum is 46.

The square root of 3978577 is about 1994.6370597179. The cubic root of 3978577 is about 158.4562069899.

The spelling of 3978577 in words is "three million, nine hundred seventy-eight thousand, five hundred seventy-seven".