8422649731 has 2 divisors, whose sum is σ = 8422649732. Its totient is φ = 8422649730.

The previous prime is 8422649723. The next prime is 8422649743. The reversal of 8422649731 is 1379462248.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8422649731 - 2³ = 8422649723 is a prime.

It is a super-2 number, since 2×8422649731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8422640731) 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, 4211324865 + 4211324866.

It is an arithmetic number, because the mean of its divisors is an integer number (4211324866).

Almost surely, 2^8422649731 is an apocalyptic number.

8422649731 is a deficient number, since it is larger than the sum of its proper divisors (1).

8422649731 is an equidigital number, since it uses as much as digits as its factorization.

8422649731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 8422649731 is about 91774.9951293924. The cubic root of 8422649731 is about 2034.6181456670.

It can be divided in two parts, 84 and 22649731, that added together give a triangular number (22649815 = T₆₇₃₀).

The spelling of 8422649731 in words is "eight billion, four hundred twenty-two million, six hundred forty-nine thousand, seven hundred thirty-one".