9961892447 has 8 divisors (see below), whose sum is σ = 10729011216. Its totient is φ = 9194890752.

The previous prime is 9961892419. The next prime is 9961892461. The reversal of 9961892447 is 7442981699.

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

It is a cyclic number.

It is not a de Polignac number, because 9961892447 - 2⁶ = 9961892383 is a prime.

It is a super-2 number, since 2×9961892447² (a number of 21 digits) 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 (9961892417) 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, 237728 + ... + 276474.

It is an arithmetic number, because the mean of its divisors is an integer number (1341126402).

Almost surely, 2^9961892447 is an apocalyptic number.

9961892447 is a deficient number, since it is larger than the sum of its proper divisors (767118769).

9961892447 is a wasteful number, since it uses less digits than its factorization.

9961892447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58537.

The product of its digits is 7838208, while the sum is 59.

The square root of 9961892447 is about 99809.2803651043. The cubic root of 9961892447 is about 2151.6945319168.

The spelling of 9961892447 in words is "nine billion, nine hundred sixty-one million, eight hundred ninety-two thousand, four hundred forty-seven".