8402471491 has 2 divisors, whose sum is σ = 8402471492. Its totient is φ = 8402471490.

The previous prime is 8402471471. The next prime is 8402471531. The reversal of 8402471491 is 1941742048.

It is an a-pointer prime, because the next prime (8402471531) can be obtained adding 8402471491 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8402471491 - 2²⁵ = 8368917059 is a prime.

It is not a weakly prime, because it can be changed into another prime (8402471401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4201235745 + 4201235746.

It is an arithmetic number, because the mean of its divisors is an integer number (4201235746).

Almost surely, 2^8402471491 is an apocalyptic number.

8402471491 is a deficient number, since it is larger than the sum of its proper divisors (1).

8402471491 is an equidigital number, since it uses as much as digits as its factorization.

8402471491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 8402471491 is about 91664.9959962908. The cubic root of 8402471491 is about 2032.9920603061.

The spelling of 8402471491 in words is "eight billion, four hundred two million, four hundred seventy-one thousand, four hundred ninety-one".