8380649 has 2 divisors, whose sum is σ = 8380650. Its totient is φ = 8380648.

The previous prime is 8380621. The next prime is 8380661. The reversal of 8380649 is 9460838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4380649 + 4000000 = 2093^2 + 2000^2 .

It is a cyclic number.

It is not a de Polignac number, because 8380649 - 2¹⁶ = 8315113 is a prime.

It is a super-2 number, since 2×8380649² = 140470555322402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8380699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4190324 + 4190325.

It is an arithmetic number, because the mean of its divisors is an integer number (4190325).

Almost surely, 2^8380649 is an apocalyptic number.

It is an amenable number.

8380649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8380649 is an equidigital number, since it uses as much as digits as its factorization.

8380649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 8380649 is about 2894.9350597207. The cubic root of 8380649 is about 203.1230538354.

The spelling of 8380649 in words is "eight million, three hundred eighty thousand, six hundred forty-nine".