9940634497 has 4 divisors (see below), whose sum is σ = 9941148756. Its totient is φ = 9940120240.

The previous prime is 9940634479. The next prime is 9940634513. The reversal of 9940634497 is 7944360499.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1501640001 + 8438994496 = 38751^2 + 91864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9940634497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9940634447) 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, 226954 + ... + 267187.

It is an arithmetic number, because the mean of its divisors is an integer number (2485287189).

Almost surely, 2^9940634497 is an apocalyptic number.

It is an amenable number.

9940634497 is a deficient number, since it is larger than the sum of its proper divisors (514259).

9940634497 is a wasteful number, since it uses less digits than its factorization.

9940634497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514258.

The product of its (nonzero) digits is 5878656, while the sum is 55.

The square root of 9940634497 is about 99702.7306396369. The cubic root of 9940634497 is about 2150.1629223572.

It can be divided in two parts, 99406 and 34497, that added together give a triangular number (133903 = T₅₁₇).

The spelling of 9940634497 in words is "nine billion, nine hundred forty million, six hundred thirty-four thousand, four hundred ninety-seven".