3123749 has 8 divisors (see below), whose sum is σ = 3255000. Its totient is φ = 2995200.

The previous prime is 3123727. The next prime is 3123751. The reversal of 3123749 is 9473213.

It can be written as a sum of positive squares in 4 ways, for example, as 172225 + 2951524 = 415^2 + 1718^2 .

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 3123749 - 2⁸ = 3123493 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 (3123709) 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, 1877 + ... + 3125.

It is an arithmetic number, because the mean of its divisors is an integer number (406875).

Almost surely, 2^3123749 is an apocalyptic number.

It is an amenable number.

3123749 is a deficient number, since it is larger than the sum of its proper divisors (131251).

3123749 is a wasteful number, since it uses less digits than its factorization.

3123749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its digits is 4536, while the sum is 29.

The square root of 3123749 is about 1767.4130813140. The cubic root of 3123749 is about 146.1813752604.

The spelling of 3123749 in words is "three million, one hundred twenty-three thousand, seven hundred forty-nine".