8458212649 has 2 divisors, whose sum is σ = 8458212650. Its totient is φ = 8458212648.

The previous prime is 8458212647. The next prime is 8458212673. The reversal of 8458212649 is 9462128548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7822164249 + 636048400 = 88443^2 + 25220^2 .

It is a cyclic number.

It is not a de Polignac number, because 8458212649 - 2¹ = 8458212647 is a prime.

It is a super-2 number, since 2×8458212649² (a number of 21 digits) contains 22 as substring.

Together with 8458212647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8458212641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4229106324 + 4229106325.

It is an arithmetic number, because the mean of its divisors is an integer number (4229106325).

Almost surely, 2^8458212649 is an apocalyptic number.

It is an amenable number.

8458212649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8458212649 is an equidigital number, since it uses as much as digits as its factorization.

8458212649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 49.

The square root of 8458212649 is about 91968.5416270150. The cubic root of 8458212649 is about 2037.4777112947.

The spelling of 8458212649 in words is "eight billion, four hundred fifty-eight million, two hundred twelve thousand, six hundred forty-nine".