78091103 has 2 divisors, whose sum is σ = 78091104. Its totient is φ = 78091102.

The previous prime is 78091067. The next prime is 78091147. The reversal of 78091103 is 30119087.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78091103 - 2¹⁰ = 78090079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78099103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39045551 + 39045552.

It is an arithmetic number, because the mean of its divisors is an integer number (39045552).

Almost surely, 2^78091103 is an apocalyptic number.

78091103 is a deficient number, since it is larger than the sum of its proper divisors (1).

78091103 is an equidigital number, since it uses as much as digits as its factorization.

78091103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 78091103 is about 8836.9170529093. The cubic root of 78091103 is about 427.4321504668.

The spelling of 78091103 in words is "seventy-eight million, ninety-one thousand, one hundred three".