9361011981 has 8 divisors (see below), whose sum is σ = 12489320704. Its totient is φ = 6236688960.

The previous prime is 9361011943. The next prime is 9361012021. The reversal of 9361011981 is 1891101639.

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

It is not a de Polignac number, because 9361011981 - 2⁹ = 9361011469 is a prime.

It is a super-2 number, since 2×9361011981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9361015981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 990940 + ... + 1000341.

It is an arithmetic number, because the mean of its divisors is an integer number (1561165088).

Almost surely, 2^9361011981 is an apocalyptic number.

It is an amenable number.

9361011981 is a deficient number, since it is larger than the sum of its proper divisors (3128308723).

9361011981 is a wasteful number, since it uses less digits than its factorization.

9361011981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992851.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 9361011981 is about 96752.3228713399. The cubic root of 9361011981 is about 2107.5324343878.

The spelling of 9361011981 in words is "nine billion, three hundred sixty-one million, eleven thousand, nine hundred eighty-one".