9940939453 has 8 divisors (see below), whose sum is σ = 9981244728. Its totient is φ = 9900678144.

The previous prime is 9940939447. The next prime is 9940939511. The reversal of 9940939453 is 3549390499.

It can be written as a sum of positive squares in 4 ways, for example, as 7129606969 + 2811332484 = 84437^2 + 53022^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9940939453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9940939394 and 9940939403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9940939553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487225 + ... + 507217.

It is an arithmetic number, because the mean of its divisors is an integer number (1247655591).

Almost surely, 2^9940939453 is an apocalyptic number.

It is an amenable number.

9940939453 is a deficient number, since it is larger than the sum of its proper divisors (40305275).

9940939453 is a wasteful number, since it uses less digits than its factorization.

9940939453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21983.

The product of its (nonzero) digits is 4723920, while the sum is 55.

The square root of 9940939453 is about 99704.2599541263. The cubic root of 9940939453 is about 2150.1849094976.

The spelling of 9940939453 in words is "nine billion, nine hundred forty million, nine hundred thirty-nine thousand, four hundred fifty-three".