40968821 has 4 divisors (see below), whose sum is σ = 40998144. Its totient is φ = 40939500.

The previous prime is 40968817. The next prime is 40968853. The reversal of 40968821 is 12886904.

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 a cyclic number.

It is not a de Polignac number, because 40968821 - 2² = 40968817 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 (40962821) 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, 12455 + ... + 15396.

It is an arithmetic number, because the mean of its divisors is an integer number (10249536).

Almost surely, 2^40968821 is an apocalyptic number.

It is an amenable number.

40968821 is a deficient number, since it is larger than the sum of its proper divisors (29323).

40968821 is a wasteful number, since it uses less digits than its factorization.

40968821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29322.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 40968821 is about 6400.6891035263. The cubic root of 40968821 is about 344.7342937701.

The spelling of 40968821 in words is "forty million, nine hundred sixty-eight thousand, eight hundred twenty-one".