78753397 has 2 divisors, whose sum is σ = 78753398. Its totient is φ = 78753396.

The previous prime is 78753383. The next prime is 78753421. The reversal of 78753397 is 79335787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50779876 + 27973521 = 7126^2 + 5289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78753397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78753397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78753307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39376698 + 39376699.

It is an arithmetic number, because the mean of its divisors is an integer number (39376699).

Almost surely, 2^78753397 is an apocalyptic number.

It is an amenable number.

78753397 is a deficient number, since it is larger than the sum of its proper divisors (1).

78753397 is an equidigital number, since it uses as much as digits as its factorization.

78753397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 49.

The square root of 78753397 is about 8874.3110718523. The cubic root of 78753397 is about 428.6371072411.

The spelling of 78753397 in words is "seventy-eight million, seven hundred fifty-three thousand, three hundred ninety-seven".