78757253 has 2 divisors, whose sum is σ = 78757254. Its totient is φ = 78757252.

The previous prime is 78757219. The next prime is 78757279. The reversal of 78757253 is 35275787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 15108769 = 7978^2 + 3887^2 .

It is an emirp because it is prime and its reverse (35275787) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78757253 - 2¹⁰ = 78756229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78757213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39378626 + 39378627.

It is an arithmetic number, because the mean of its divisors is an integer number (39378627).

Almost surely, 2^78757253 is an apocalyptic number.

It is an amenable number.

78757253 is a deficient number, since it is larger than the sum of its proper divisors (1).

78757253 is an equidigital number, since it uses as much as digits as its factorization.

78757253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411600, while the sum is 44.

The square root of 78757253 is about 8874.5283254943. The cubic root of 78757253 is about 428.6441029085.

The spelling of 78757253 in words is "seventy-eight million, seven hundred fifty-seven thousand, two hundred fifty-three".