40993213 has 4 divisors (see below), whose sum is σ = 41605120. Its totient is φ = 40381308.

The previous prime is 40993207. The next prime is 40993219. The reversal of 40993213 is 31239904.

40993213 = 97² + 98² + ... + 498².

40993213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (40993207) and next prime (40993219).

It is a cyclic number.

It is not a de Polignac number, because 40993213 - 2⁵ = 40993181 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 (40993219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305853 + ... + 305986.

It is an arithmetic number, because the mean of its divisors is an integer number (10401280).

Almost surely, 2^40993213 is an apocalyptic number.

It is an amenable number.

40993213 is a deficient number, since it is larger than the sum of its proper divisors (611907).

40993213 is an equidigital number, since it uses as much as digits as its factorization.

40993213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611906.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 40993213 is about 6402.5942398375. The cubic root of 40993213 is about 344.8026961180.

The spelling of 40993213 in words is "forty million, nine hundred ninety-three thousand, two hundred thirteen".