8081969531 has 2 divisors, whose sum is σ = 8081969532. Its totient is φ = 8081969530.

The previous prime is 8081969521. The next prime is 8081969573. The reversal of 8081969531 is 1359691808.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8081969531 - 2¹⁴ = 8081953147 is a prime.

It is a super-2 number, since 2×8081969531² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8081969531.

It is not a weakly prime, because it can be changed into another prime (8081969521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4040984765 + 4040984766.

It is an arithmetic number, because the mean of its divisors is an integer number (4040984766).

Almost surely, 2^8081969531 is an apocalyptic number.

8081969531 is a deficient number, since it is larger than the sum of its proper divisors (1).

8081969531 is an equidigital number, since it uses as much as digits as its factorization.

8081969531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 8081969531 is about 89899.7749218539. The cubic root of 8081969531 is about 2006.8075962759.

The spelling of 8081969531 in words is "eight billion, eighty-one million, nine hundred sixty-nine thousand, five hundred thirty-one".