78910201 has 2 divisors, whose sum is σ = 78910202. Its totient is φ = 78910200.

The previous prime is 78910193. The next prime is 78910213. The reversal of 78910201 is 10201987.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45212176 + 33698025 = 6724^2 + 5805^2 .

It is an emirp because it is prime and its reverse (10201987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78910201 - 2³ = 78910193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78910201.

It is not a weakly prime, because it can be changed into another prime (78910291) 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, 39455100 + 39455101.

It is an arithmetic number, because the mean of its divisors is an integer number (39455101).

Almost surely, 2^78910201 is an apocalyptic number.

It is an amenable number.

78910201 is a deficient number, since it is larger than the sum of its proper divisors (1).

78910201 is an equidigital number, since it uses as much as digits as its factorization.

78910201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 78910201 is about 8883.1413925480. The cubic root of 78910201 is about 428.9214016619.

The spelling of 78910201 in words is "seventy-eight million, nine hundred ten thousand, two hundred one".