8155897 has 2 divisors, whose sum is σ = 8155898. Its totient is φ = 8155896.

The previous prime is 8155859. The next prime is 8155909. The reversal of 8155897 is 7985518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7338681 + 817216 = 2709^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 8155897 - 2¹⁹ = 7631609 is a prime.

It is not a weakly prime, because it can be changed into another prime (8155817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4077948 + 4077949.

It is an arithmetic number, because the mean of its divisors is an integer number (4077949).

Almost surely, 2^8155897 is an apocalyptic number.

It is an amenable number.

8155897 is a deficient number, since it is larger than the sum of its proper divisors (1).

8155897 is an equidigital number, since it uses as much as digits as its factorization.

8155897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 43.

The square root of 8155897 is about 2855.8531124692. The cubic root of 8155897 is about 201.2907930116.

The spelling of 8155897 in words is "eight million, one hundred fifty-five thousand, eight hundred ninety-seven".