78882649 has 2 divisors, whose sum is σ = 78882650. Its totient is φ = 78882648.

The previous prime is 78882599. The next prime is 78882659. The reversal of 78882649 is 94628887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42159049 + 36723600 = 6493^2 + 6060^2 .

It is a cyclic number.

It is not a de Polignac number, because 78882649 - 2⁹ = 78882137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78882596 and 78882605.

It is not a weakly prime, because it can be changed into another prime (78882659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39441324 + 39441325.

It is an arithmetic number, because the mean of its divisors is an integer number (39441325).

Almost surely, 2^78882649 is an apocalyptic number.

It is an amenable number.

78882649 is a deficient number, since it is larger than the sum of its proper divisors (1).

78882649 is an equidigital number, since it uses as much as digits as its factorization.

78882649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 52.

The square root of 78882649 is about 8881.5904544175. The cubic root of 78882649 is about 428.8714756364.

The spelling of 78882649 in words is "seventy-eight million, eight hundred eighty-two thousand, six hundred forty-nine".