78536903 has 4 divisors (see below), whose sum is σ = 80659560. Its totient is φ = 76414248.

The previous prime is 78536891. The next prime is 78536929. The reversal of 78536903 is 30963587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78536903 - 2¹² = 78532807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78536803) 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 in 3 ways as a sum of consecutive naturals, for example, 1061273 + ... + 1061346.

It is an arithmetic number, because the mean of its divisors is an integer number (20164890).

Almost surely, 2^78536903 is an apocalyptic number.

78536903 is a deficient number, since it is larger than the sum of its proper divisors (2122657).

78536903 is a wasteful number, since it uses less digits than its factorization.

78536903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2122656.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 78536903 is about 8862.1048854096. The cubic root of 78536903 is about 428.2439706518.

The spelling of 78536903 in words is "seventy-eight million, five hundred thirty-six thousand, nine hundred three".