40831643 has 4 divisors (see below), whose sum is σ = 41153280. Its totient is φ = 40510008.

The previous prime is 40831621. The next prime is 40831657. The reversal of 40831643 is 34613804.

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 40831643 - 2¹² = 40827547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40831543) 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, 160628 + ... + 160881.

It is an arithmetic number, because the mean of its divisors is an integer number (10288320).

Almost surely, 2^40831643 is an apocalyptic number.

40831643 is a deficient number, since it is larger than the sum of its proper divisors (321637).

40831643 is a wasteful number, since it uses less digits than its factorization.

40831643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321636.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 40831643 is about 6389.9642409015. The cubic root of 40831643 is about 344.3490997020.

The spelling of 40831643 in words is "forty million, eight hundred thirty-one thousand, six hundred forty-three".