78915103 has 2 divisors, whose sum is σ = 78915104. Its totient is φ = 78915102.

The previous prime is 78915101. The next prime is 78915107. The reversal of 78915103 is 30151987.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78915103 - 2¹ = 78915101 is a prime.

Together with 78915101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78915101) 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, 39457551 + 39457552.

It is an arithmetic number, because the mean of its divisors is an integer number (39457552).

Almost surely, 2^78915103 is an apocalyptic number.

78915103 is a deficient number, since it is larger than the sum of its proper divisors (1).

78915103 is an equidigital number, since it uses as much as digits as its factorization.

78915103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 78915103 is about 8883.4173041685. The cubic root of 78915103 is about 428.9302831886.

The spelling of 78915103 in words is "seventy-eight million, nine hundred fifteen thousand, one hundred three".