8344578149 has 2 divisors, whose sum is σ = 8344578150. Its totient is φ = 8344578148.

The previous prime is 8344578139. The next prime is 8344578239. The reversal of 8344578149 is 9418754438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8343909025 + 669124 = 91345^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 8344578149 - 2⁴ = 8344578133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8344578149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8344578139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4172289074 + 4172289075.

It is an arithmetic number, because the mean of its divisors is an integer number (4172289075).

Almost surely, 2^8344578149 is an apocalyptic number.

It is an amenable number.

8344578149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8344578149 is an equidigital number, since it uses as much as digits as its factorization.

8344578149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 53.

The square root of 8344578149 is about 91348.6625463121. The cubic root of 8344578149 is about 2028.3121651985.

The spelling of 8344578149 in words is "eight billion, three hundred forty-four million, five hundred seventy-eight thousand, one hundred forty-nine".