8970631993 has 2 divisors, whose sum is σ = 8970631994. Its totient is φ = 8970631992.

The previous prime is 8970631987. The next prime is 8970631997. The reversal of 8970631993 is 3991360798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4487392144 + 4483239849 = 66988^2 + 66957^2 .

It is a cyclic number.

It is not a de Polignac number, because 8970631993 - 2¹⁷ = 8970500921 is a prime.

It is not a weakly prime, because it can be changed into another prime (8970631997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4485315996 + 4485315997.

It is an arithmetic number, because the mean of its divisors is an integer number (4485315997).

Almost surely, 2^8970631993 is an apocalyptic number.

It is an amenable number.

8970631993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8970631993 is an equidigital number, since it uses as much as digits as its factorization.

8970631993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The square root of 8970631993 is about 94713.4203426315. The cubic root of 8970631993 is about 2077.8188422163.

The spelling of 8970631993 in words is "eight billion, nine hundred seventy million, six hundred thirty-one thousand, nine hundred ninety-three".