78853903 has 4 divisors (see below), whose sum is σ = 78891840. Its totient is φ = 78815968.

The previous prime is 78853823. The next prime is 78853937. The reversal of 78853903 is 30935887.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30935887 = 431 ⋅71777.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78853903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78853903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78853303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15658 + ... + 20071.

It is an arithmetic number, because the mean of its divisors is an integer number (19722960).

Almost surely, 2^78853903 is an apocalyptic number.

78853903 is a deficient number, since it is larger than the sum of its proper divisors (37937).

78853903 is a wasteful number, since it uses less digits than its factorization.

78853903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37936.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 78853903 is about 8879.9720157217. The cubic root of 78853903 is about 428.8193736113.

The spelling of 78853903 in words is "seventy-eight million, eight hundred fifty-three thousand, nine hundred three".