8115649 has 2 divisors, whose sum is σ = 8115650. Its totient is φ = 8115648.

The previous prime is 8115593. The next prime is 8115659. The reversal of 8115649 is 9465118.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5452225 + 2663424 = 2335^2 + 1632^2 .

It is a cyclic number.

It is not a de Polignac number, because 8115649 - 2¹¹ = 8113601 is a prime.

It is equal to p₅₄₆₉₉₁ and since 8115649 and 546991 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (8115659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4057824 + 4057825.

It is an arithmetic number, because the mean of its divisors is an integer number (4057825).

Almost surely, 2^8115649 is an apocalyptic number.

It is an amenable number.

8115649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8115649 is an equidigital number, since it uses as much as digits as its factorization.

8115649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 8115649 is about 2848.7978166237. The cubic root of 8115649 is about 200.9591346177.

It can be divided in two parts, 8115 and 649, that multiplied together give a triangular number (5266635 = T₃₂₄₅).

The spelling of 8115649 in words is "eight million, one hundred fifteen thousand, six hundred forty-nine".