4000749 has 4 divisors (see below), whose sum is σ = 5334336. Its totient is φ = 2667164.

The previous prime is 4000747. The next prime is 4000751. The reversal of 4000749 is 9470004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (4000747) and next prime (4000751).

It is a cyclic number.

It is not a de Polignac number, because 4000749 - 2¹ = 4000747 is a prime.

It is a super-2 number, since 2×4000749² = 32011985122002, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000741) 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, 666789 + ... + 666794.

It is an arithmetic number, because the mean of its divisors is an integer number (1333584).

Almost surely, 2^4000749 is an apocalyptic number.

It is an amenable number.

4000749 is a deficient number, since it is larger than the sum of its proper divisors (1333587).

4000749 is a wasteful number, since it uses less digits than its factorization.

4000749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333586.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 4000749 is about 2000.1872412352. The cubic root of 4000749 is about 158.7500126067.

The spelling of 4000749 in words is "four million, seven hundred forty-nine", and thus it is an aban number.