78964673 has 2 divisors, whose sum is σ = 78964674. Its totient is φ = 78964672.

The previous prime is 78964661. The next prime is 78964679. The reversal of 78964673 is 37646987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46895104 + 32069569 = 6848^2 + 5663^2 .

It is a cyclic number.

It is not a de Polignac number, because 78964673 - 2¹² = 78960577 is a prime.

It is not a weakly prime, because it can be changed into another prime (78964679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39482336 + 39482337.

It is an arithmetic number, because the mean of its divisors is an integer number (39482337).

Almost surely, 2^78964673 is an apocalyptic number.

It is an amenable number.

78964673 is a deficient number, since it is larger than the sum of its proper divisors (1).

78964673 is an equidigital number, since it uses as much as digits as its factorization.

78964673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 50.

The square root of 78964673 is about 8886.2068960834. The cubic root of 78964673 is about 429.0200742975.

The spelling of 78964673 in words is "seventy-eight million, nine hundred sixty-four thousand, six hundred seventy-three".