8539256149 has 2 divisors, whose sum is σ = 8539256150. Its totient is φ = 8539256148.

The previous prime is 8539256137. The next prime is 8539256153. The reversal of 8539256149 is 9416529358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8539053649 + 202500 = 92407^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 8539256149 - 2²⁵ = 8505701717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8539256096 and 8539256105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8539256129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4269628074 + 4269628075.

It is an arithmetic number, because the mean of its divisors is an integer number (4269628075).

Almost surely, 2^8539256149 is an apocalyptic number.

It is an amenable number.

8539256149 is a deficient number, since it is larger than the sum of its proper divisors (1).

8539256149 is an equidigital number, since it uses as much as digits as its factorization.

8539256149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 52.

The square root of 8539256149 is about 92408.0956897176. The cubic root of 8539256149 is about 2043.9644926162.

The spelling of 8539256149 in words is "eight billion, five hundred thirty-nine million, two hundred fifty-six thousand, one hundred forty-nine".