78622673 has 2 divisors, whose sum is σ = 78622674. Its totient is φ = 78622672.

The previous prime is 78622651. The next prime is 78622693. The reversal of 78622673 is 37622687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 7524049 = 8432^2 + 2743^2 .

It is a cyclic number.

It is not a de Polignac number, because 78622673 - 2¹⁰ = 78621649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78622673.

It is not a weakly prime, because it can be changed into another prime (78622693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39311336 + 39311337.

It is an arithmetic number, because the mean of its divisors is an integer number (39311337).

Almost surely, 2^78622673 is an apocalyptic number.

It is an amenable number.

78622673 is a deficient number, since it is larger than the sum of its proper divisors (1).

78622673 is an equidigital number, since it uses as much as digits as its factorization.

78622673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 78622673 is about 8866.9427087356. The cubic root of 78622673 is about 428.3998087397.

The spelling of 78622673 in words is "seventy-eight million, six hundred twenty-two thousand, six hundred seventy-three".