40941070921 has 3 divisors (see below), whose sum is σ = 40941273261. Its totient is φ = 40940868582.

The previous prime is 40941070909. The next prime is 40941070927. The reversal of 40941070921 is 12907014904.

The square root of 40941070921 is 202339.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 40941070921 - 2²³ = 40932682313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40941070927) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 101170 + ... + 303508.

It is an arithmetic number, because the mean of its divisors is an integer number (13647091087).

Almost surely, 2^40941070921 is an apocalyptic number.

40941070921 is the 202339-th square number.

40941070921 is the 101170-th centered octagonal number.

It is an amenable number.

40941070921 is a deficient number, since it is larger than the sum of its proper divisors (202340).

40941070921 is an frugal number, since it uses more digits than its factorization.

40941070921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404678 (or 202339 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 40941070921 in words is "forty billion, nine hundred forty-one million, seventy thousand, nine hundred twenty-one".