78103143 has 16 divisors (see below), whose sum is σ = 118172160. Its totient is φ = 50960088.

The previous prime is 78103141. The next prime is 78103153. The reversal of 78103143 is 34130187.

It is not a de Polignac number, because 78103143 - 2¹ = 78103141 is a prime.

It is a super-2 number, since 2×78103143² = 12200201892956898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78103141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29505 + ... + 32042.

It is an arithmetic number, because the mean of its divisors is an integer number (7385760).

Almost surely, 2^78103143 is an apocalyptic number.

78103143 is a deficient number, since it is larger than the sum of its proper divisors (40069017).

78103143 is a wasteful number, since it uses less digits than its factorization.

78103143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61603 (or 61597 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 78103143 is about 8837.5982597083. The cubic root of 78103143 is about 427.4541163436.

The spelling of 78103143 in words is "seventy-eight million, one hundred three thousand, one hundred forty-three".