3923749 has 8 divisors (see below), whose sum is σ = 4042872. Its totient is φ = 3806400.

The previous prime is 3923737. The next prime is 3923761. The reversal of 3923749 is 9473293.

It is an interprime number because it is at equal distance from previous prime (3923737) and next prime (3923761).

It can be written as a sum of positive squares in 4 ways, for example, as 3175524 + 748225 = 1782^2 + 865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3923749 - 2¹³ = 3915557 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 (3923779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4987 + ... + 5719.

It is an arithmetic number, because the mean of its divisors is an integer number (505359).

Almost surely, 2^3923749 is an apocalyptic number.

It is an amenable number.

3923749 is a deficient number, since it is larger than the sum of its proper divisors (119123).

3923749 is a wasteful number, since it uses less digits than its factorization.

3923749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its digits is 40824, while the sum is 37.

The square root of 3923749 is about 1980.8455265366. The cubic root of 3923749 is about 157.7249527619.

The spelling of 3923749 in words is "three million, nine hundred twenty-three thousand, seven hundred forty-nine".