78633349 has 2 divisors, whose sum is σ = 78633350. Its totient is φ = 78633348.

The previous prime is 78633307. The next prime is 78633377. The reversal of 78633349 is 94333687.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62489025 + 16144324 = 7905^2 + 4018^2 .

It is a cyclic number.

It is not a de Polignac number, because 78633349 - 2¹⁹ = 78109061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78639349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39316674 + 39316675.

It is an arithmetic number, because the mean of its divisors is an integer number (39316675).

Almost surely, 2^78633349 is an apocalyptic number.

It is an amenable number.

78633349 is a deficient number, since it is larger than the sum of its proper divisors (1).

78633349 is an equidigital number, since it uses as much as digits as its factorization.

78633349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 43.

The square root of 78633349 is about 8867.5446996336. The cubic root of 78633349 is about 428.4191983516.

The spelling of 78633349 in words is "seventy-eight million, six hundred thirty-three thousand, three hundred forty-nine".