3678749 has 4 divisors (see below), whose sum is σ = 3895164. Its totient is φ = 3462336.

The previous prime is 3678743. The next prime is 3678751. The reversal of 3678749 is 9478763.

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 2856100 + 822649 = 1690^2 + 907^2 .

It is a cyclic number.

It is not a de Polignac number, because 3678749 - 2¹² = 3674653 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3678743) 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, 108182 + ... + 108215.

It is an arithmetic number, because the mean of its divisors is an integer number (973791).

Almost surely, 2^3678749 is an apocalyptic number.

It is an amenable number.

3678749 is a deficient number, since it is larger than the sum of its proper divisors (216415).

3678749 is a wasteful number, since it uses less digits than its factorization.

3678749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216414.

The product of its digits is 254016, while the sum is 44.

The square root of 3678749 is about 1918.0065171943. The cubic root of 3678749 is about 154.3713559981.

The spelling of 3678749 in words is "three million, six hundred seventy-eight thousand, seven hundred forty-nine".