4009931 has 4 divisors (see below), whose sum is σ = 4221000. Its totient is φ = 3798864.

The previous prime is 4009921. The next prime is 4009933. The reversal of 4009931 is 1399004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4009931 - 2¹⁴ = 3993547 is a prime.

It is a super-2 number, since 2×4009931² = 32159093249522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4009931.

It is not an unprimeable number, because it can be changed into a prime (4009933) 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, 105506 + ... + 105543.

It is an arithmetic number, because the mean of its divisors is an integer number (1055250).

Almost surely, 2^4009931 is an apocalyptic number.

4009931 is a deficient number, since it is larger than the sum of its proper divisors (211069).

4009931 is a wasteful number, since it uses less digits than its factorization.

4009931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211068.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 4009931 is about 2002.4812108981. The cubic root of 4009931 is about 158.8713672917.

The spelling of 4009931 in words is "four million, nine thousand, nine hundred thirty-one".