78948851 has 2 divisors, whose sum is σ = 78948852. Its totient is φ = 78948850.

The previous prime is 78948841. The next prime is 78948869. The reversal of 78948851 is 15884987.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78948851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78948851.

It is not a weakly prime, because it can be changed into another prime (78948841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39474425 + 39474426.

It is an arithmetic number, because the mean of its divisors is an integer number (39474426).

Almost surely, 2^78948851 is an apocalyptic number.

78948851 is a deficient number, since it is larger than the sum of its proper divisors (1).

78948851 is an equidigital number, since it uses as much as digits as its factorization.

78948851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 50.

The square root of 78948851 is about 8885.3165953724. The cubic root of 78948851 is about 428.9914184072.

The spelling of 78948851 in words is "seventy-eight million, nine hundred forty-eight thousand, eight hundred fifty-one".