78081903 has 6 divisors (see below), whose sum is σ = 112784984. Its totient is φ = 52054596.

The previous prime is 78081893. The next prime is 78081929. The reversal of 78081903 is 30918087.

It is not a de Polignac number, because 78081903 - 2¹⁰ = 78080879 is a prime.

It is a super-2 number, since 2×78081903² = 12193567152202818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78082903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4337875 + ... + 4337892.

Almost surely, 2^78081903 is an apocalyptic number.

78081903 is a deficient number, since it is larger than the sum of its proper divisors (34703081).

78081903 is a wasteful number, since it uses less digits than its factorization.

78081903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8675773 (or 8675770 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 78081903 is about 8836.3964940467. The cubic root of 78081903 is about 427.4153643880.

The spelling of 78081903 in words is "seventy-eight million, eighty-one thousand, nine hundred three".