78570113 has 2 divisors, whose sum is σ = 78570114. Its totient is φ = 78570112.

The previous prime is 78570083. The next prime is 78570131. The reversal of 78570113 is 31107587.

Together with next prime (78570131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55606849 + 22963264 = 7457^2 + 4792^2 .

It is a cyclic number.

It is not a de Polignac number, because 78570113 - 2⁸ = 78569857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78570113.

It is not a weakly prime, because it can be changed into another prime (78570313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285056 + 39285057.

It is an arithmetic number, because the mean of its divisors is an integer number (39285057).

Almost surely, 2^78570113 is an apocalyptic number.

It is an amenable number.

78570113 is a deficient number, since it is larger than the sum of its proper divisors (1).

78570113 is an equidigital number, since it uses as much as digits as its factorization.

78570113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 32.

The square root of 78570113 is about 8863.9783957318. The cubic root of 78570113 is about 428.3043243521.

The spelling of 78570113 in words is "seventy-eight million, five hundred seventy thousand, one hundred thirteen".