9720049381 has 8 divisors (see below), whose sum is σ = 11212447680. Its totient is φ = 8253606048.

The previous prime is 9720049373. The next prime is 9720049397. The reversal of 9720049381 is 1839400279.

9720049381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9720049381 - 2³ = 9720049373 is a prime.

It is a super-2 number, since 2×9720049381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720049351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6487936 + ... + 6489433.

It is an arithmetic number, because the mean of its divisors is an integer number (1401555960).

Almost surely, 2^9720049381 is an apocalyptic number.

It is an amenable number.

9720049381 is a deficient number, since it is larger than the sum of its proper divisors (1492398299).

9720049381 is a wasteful number, since it uses less digits than its factorization.

9720049381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12977483.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 9720049381 is about 98590.3107866082. The cubic root of 9720049381 is about 2134.1395967404.

The spelling of 9720049381 in words is "nine billion, seven hundred twenty million, forty-nine thousand, three hundred eighty-one".