8550667397 has 2 divisors, whose sum is σ = 8550667398. Its totient is φ = 8550667396.

The previous prime is 8550667343. The next prime is 8550667421. The reversal of 8550667397 is 7937660558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4413476356 + 4137191041 = 66434^2 + 64321^2 .

It is a cyclic number.

It is not a de Polignac number, because 8550667397 - 2⁸ = 8550667141 is a prime.

It is a super-2 number, since 2×8550667397² (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 (8550667297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4275333698 + 4275333699.

It is an arithmetic number, because the mean of its divisors is an integer number (4275333699).

Almost surely, 2^8550667397 is an apocalyptic number.

It is an amenable number.

8550667397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8550667397 is an equidigital number, since it uses as much as digits as its factorization.

8550667397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 56.

The square root of 8550667397 is about 92469.8188437719. The cubic root of 8550667397 is about 2044.8745564219.

The spelling of 8550667397 in words is "eight billion, five hundred fifty million, six hundred sixty-seven thousand, three hundred ninety-seven".