9372671981 has 2 divisors, whose sum is σ = 9372671982. Its totient is φ = 9372671980.

The previous prime is 9372671977. The next prime is 9372672097. The reversal of 9372671981 is 1891762739.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9349149481 + 23522500 = 96691^2 + 4850^2 .

It is an emirp because it is prime and its reverse (1891762739) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9372671981 - 2² = 9372671977 is a prime.

It is a super-2 number, since 2×9372671981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9372671681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4686335990 + 4686335991.

It is an arithmetic number, because the mean of its divisors is an integer number (4686335991).

Almost surely, 2^9372671981 is an apocalyptic number.

It is an amenable number.

9372671981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9372671981 is an equidigital number, since it uses as much as digits as its factorization.

9372671981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 53.

The square root of 9372671981 is about 96812.5610703487. The cubic root of 9372671981 is about 2108.4071130480.

The spelling of 9372671981 in words is "nine billion, three hundred seventy-two million, six hundred seventy-one thousand, nine hundred eighty-one".