3749749 has 4 divisors (see below), whose sum is σ = 3763564. Its totient is φ = 3735936.

The previous prime is 3749699. The next prime is 3749761. The reversal of 3749749 is 9479473.

It is a happy number.

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 2380849 + 1368900 = 1543^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 3749749 - 2¹⁵ = 3716981 is a prime.

It is a Duffinian number.

3749749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3749549) 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, 6492 + ... + 7045.

It is an arithmetic number, because the mean of its divisors is an integer number (940891).

Almost surely, 2^3749749 is an apocalyptic number.

It is an amenable number.

3749749 is a deficient number, since it is larger than the sum of its proper divisors (13815).

3749749 is a wasteful number, since it uses less digits than its factorization.

3749749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13814.

The product of its digits is 190512, while the sum is 43.

The square root of 3749749 is about 1936.4268640979. The cubic root of 3749749 is about 155.3581589299.

The spelling of 3749749 in words is "three million, seven hundred forty-nine thousand, seven hundred forty-nine".