3918143 has 4 divisors (see below), whose sum is σ = 4148640. Its totient is φ = 3687648.

The previous prime is 3918139. The next prime is 3918149. The reversal of 3918143 is 3418193.

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 3918143 - 2² = 3918139 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 (3918149) 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, 115223 + ... + 115256.

It is an arithmetic number, because the mean of its divisors is an integer number (1037160).

Almost surely, 2^3918143 is an apocalyptic number.

3918143 is a deficient number, since it is larger than the sum of its proper divisors (230497).

3918143 is a wasteful number, since it uses less digits than its factorization.

3918143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230496.

The product of its digits is 2592, while the sum is 29.

The square root of 3918143 is about 1979.4299684505. The cubic root of 3918143 is about 157.6498012067.

The spelling of 3918143 in words is "three million, nine hundred eighteen thousand, one hundred forty-three".