8158196731 has 2 divisors, whose sum is σ = 8158196732. Its totient is φ = 8158196730.

The previous prime is 8158196719. The next prime is 8158196749. The reversal of 8158196731 is 1376918518.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8158196731 - 2¹⁷ = 8158065659 is a prime.

It is a super-2 number, since 2×8158196731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8158194731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079098365 + 4079098366.

It is an arithmetic number, because the mean of its divisors is an integer number (4079098366).

Almost surely, 2^8158196731 is an apocalyptic number.

8158196731 is a deficient number, since it is larger than the sum of its proper divisors (1).

8158196731 is an equidigital number, since it uses as much as digits as its factorization.

8158196731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 49.

The square root of 8158196731 is about 90322.7365119104. The cubic root of 8158196731 is about 2013.0971065992.

The spelling of 8158196731 in words is "eight billion, one hundred fifty-eight million, one hundred ninety-six thousand, seven hundred thirty-one".