40993831 has 4 divisors (see below), whose sum is σ = 41023872. Its totient is φ = 40963792.

The previous prime is 40993789. The next prime is 40993837. The reversal of 40993831 is 13839904.

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 40993831 - 2¹⁹ = 40469543 is a prime.

It is a super-2 number, since 2×40993831² = 3360988360113122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40993837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12871 + ... + 15736.

It is an arithmetic number, because the mean of its divisors is an integer number (10255968).

Almost surely, 2^40993831 is an apocalyptic number.

40993831 is a deficient number, since it is larger than the sum of its proper divisors (30041).

40993831 is a wasteful number, since it uses less digits than its factorization.

40993831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30040.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 40993831 is about 6402.6425013427. The cubic root of 40993831 is about 344.8044288195.

The spelling of 40993831 in words is "forty million, nine hundred ninety-three thousand, eight hundred thirty-one".