8371491497 has 2 divisors, whose sum is σ = 8371491498. Its totient is φ = 8371491496.

The previous prime is 8371491467. The next prime is 8371491547. The reversal of 8371491497 is 7941941738.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8274449296 + 97042201 = 90964^2 + 9851^2 .

It is a cyclic number.

It is not a de Polignac number, because 8371491497 - 2¹⁴ = 8371475113 is a prime.

It is a super-3 number, since 3×8371491497³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (8371491467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4185745748 + 4185745749.

It is an arithmetic number, because the mean of its divisors is an integer number (4185745749).

Almost surely, 2^8371491497 is an apocalyptic number.

It is an amenable number.

8371491497 is a deficient number, since it is larger than the sum of its proper divisors (1).

8371491497 is an equidigital number, since it uses as much as digits as its factorization.

8371491497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 53.

The square root of 8371491497 is about 91495.8550809817. The cubic root of 8371491497 is about 2030.4904294457.

The spelling of 8371491497 in words is "eight billion, three hundred seventy-one million, four hundred ninety-one thousand, four hundred ninety-seven".