78751193 has 2 divisors, whose sum is σ = 78751194. Its totient is φ = 78751192.

The previous prime is 78751177. The next prime is 78751213. The reversal of 78751193 is 39115787.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 38809 = 8872^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 78751193 - 2⁴ = 78751177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78751193.

It is not a weakly prime, because it can be changed into another prime (78751493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39375596 + 39375597.

It is an arithmetic number, because the mean of its divisors is an integer number (39375597).

Almost surely, 2^78751193 is an apocalyptic number.

It is an amenable number.

78751193 is a deficient number, since it is larger than the sum of its proper divisors (1).

78751193 is an equidigital number, since it uses as much as digits as its factorization.

78751193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 78751193 is about 8874.1868923299. The cubic root of 78751193 is about 428.6331085776.

The spelling of 78751193 in words is "seventy-eight million, seven hundred fifty-one thousand, one hundred ninety-three".