8631620149 has 2 divisors, whose sum is σ = 8631620150. Its totient is φ = 8631620148.

The previous prime is 8631620141. The next prime is 8631620177. The reversal of 8631620149 is 9410261368.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8589953124 + 41667025 = 92682^2 + 6455^2 .

It is a cyclic number.

It is not a de Polignac number, because 8631620149 - 2³ = 8631620141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8631620141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4315810074 + 4315810075.

It is an arithmetic number, because the mean of its divisors is an integer number (4315810075).

Almost surely, 2^8631620149 is an apocalyptic number.

It is an amenable number.

8631620149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8631620149 is an equidigital number, since it uses as much as digits as its factorization.

8631620149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 8631620149 is about 92906.5129525374. The cubic root of 8631620149 is about 2051.3075258836.

The spelling of 8631620149 in words is "eight billion, six hundred thirty-one million, six hundred twenty thousand, one hundred forty-nine".