3918081 has 4 divisors (see below), whose sum is σ = 5224112. Its totient is φ = 2612052.

The previous prime is 3918071. The next prime is 3918127. The reversal of 3918081 is 1808193.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3918081 - 2¹³ = 3909889 is a prime.

It is a super-2 number, since 2×3918081² = 30702717445122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3918011) 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, 653011 + ... + 653016.

It is an arithmetic number, because the mean of its divisors is an integer number (1306028).

Almost surely, 2^3918081 is an apocalyptic number.

It is an amenable number.

3918081 is a deficient number, since it is larger than the sum of its proper divisors (1306031).

3918081 is a wasteful number, since it uses less digits than its factorization.

3918081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306030.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 3918081 is about 1979.4143073142. The cubic root of 3918081 is about 157.6489696614.

The spelling of 3918081 in words is "three million, nine hundred eighteen thousand, eighty-one".