8497938391 has 2 divisors, whose sum is σ = 8497938392. Its totient is φ = 8497938390.

The previous prime is 8497938377. The next prime is 8497938437. The reversal of 8497938391 is 1938397948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8497938391 - 2¹⁷ = 8497807319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8497938301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4248969195 + 4248969196.

It is an arithmetic number, because the mean of its divisors is an integer number (4248969196).

Almost surely, 2^8497938391 is an apocalyptic number.

8497938391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8497938391 is an equidigital number, since it uses as much as digits as its factorization.

8497938391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 61.

The square root of 8497938391 is about 92184.2632502967. The cubic root of 8497938391 is about 2040.6625419921.

The spelling of 8497938391 in words is "eight billion, four hundred ninety-seven million, nine hundred thirty-eight thousand, three hundred ninety-one".