78515363 has 2 divisors, whose sum is σ = 78515364. Its totient is φ = 78515362.

The previous prime is 78515351. The next prime is 78515407. The reversal of 78515363 is 36351587.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78515363 - 2⁴ = 78515347 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78515303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39257681 + 39257682.

It is an arithmetic number, because the mean of its divisors is an integer number (39257682).

Almost surely, 2^78515363 is an apocalyptic number.

78515363 is a deficient number, since it is larger than the sum of its proper divisors (1).

78515363 is an equidigital number, since it uses as much as digits as its factorization.

78515363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

The square root of 78515363 is about 8860.8895151672. The cubic root of 78515363 is about 428.2048161558.

The spelling of 78515363 in words is "seventy-eight million, five hundred fifteen thousand, three hundred sixty-three".