8381921037 has 12 divisors (see below), whose sum is σ = 13000530816. Its totient is φ = 4789669080.

The previous prime is 8381920997. The next prime is 8381921039. The reversal of 8381921037 is 7301291838.

It is not a de Polignac number, because 8381921037 - 2¹⁸ = 8381658893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8381921037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381921039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28509789 + ... + 28510082.

It is an arithmetic number, because the mean of its divisors is an integer number (1083377568).

Almost surely, 2^8381921037 is an apocalyptic number.

It is an amenable number.

8381921037 is a deficient number, since it is larger than the sum of its proper divisors (4618609779).

8381921037 is a wasteful number, since it uses less digits than its factorization.

8381921037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57019888 (or 57019881 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 8381921037 is about 91552.8319441840. The cubic root of 8381921037 is about 2031.3333016637. Note that the first 4 decimals are identical.

The spelling of 8381921037 in words is "eight billion, three hundred eighty-one million, nine hundred twenty-one thousand, thirty-seven".