3868657 has 4 divisors (see below), whose sum is σ = 4166260. Its totient is φ = 3571056.

The previous prime is 3868649. The next prime is 3868679. The reversal of 3868657 is 7568683.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 349281 + 3519376 = 591^2 + 1876^2 .

It is a cyclic number.

It is not a de Polignac number, because 3868657 - 2³ = 3868649 is a prime.

It is a Duffinian number.

3868657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3868057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148782 + ... + 148807.

It is an arithmetic number, because the mean of its divisors is an integer number (1041565).

Almost surely, 2^3868657 is an apocalyptic number.

It is an amenable number.

3868657 is a deficient number, since it is larger than the sum of its proper divisors (297603).

3868657 is a wasteful number, since it uses less digits than its factorization.

3868657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297602.

The product of its digits is 241920, while the sum is 43.

The square root of 3868657 is about 1966.8901850383. The cubic root of 3868657 is about 156.9832835462.

The spelling of 3868657 in words is "three million, eight hundred sixty-eight thousand, six hundred fifty-seven".