78334253 has 2 divisors, whose sum is σ = 78334254. Its totient is φ = 78334252.

The previous prime is 78334237. The next prime is 78334273. The reversal of 78334253 is 35243387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72965764 + 5368489 = 8542^2 + 2317^2 .

It is a cyclic number.

It is not a de Polignac number, because 78334253 - 2⁴ = 78334237 is a prime.

It is a super-2 number, since 2×78334253² = 12272510386136018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78334213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39167126 + 39167127.

It is an arithmetic number, because the mean of its divisors is an integer number (39167127).

Almost surely, 2^78334253 is an apocalyptic number.

It is an amenable number.

78334253 is a deficient number, since it is larger than the sum of its proper divisors (1).

78334253 is an equidigital number, since it uses as much as digits as its factorization.

78334253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 35.

The square root of 78334253 is about 8850.6639863911. The cubic root of 78334253 is about 427.8753185168.

It can be divided in two parts, 78334 and 253, that added together give a palindrome (78587).

The spelling of 78334253 in words is "seventy-eight million, three hundred thirty-four thousand, two hundred fifty-three".