6940181 has 4 divisors (see below), whose sum is σ = 7241952. Its totient is φ = 6638412.

The previous prime is 6940177. The next prime is 6940189. The reversal of 6940181 is 1810496.

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 a cyclic number.

It is not a de Polignac number, because 6940181 - 2² = 6940177 is a prime.

It is a super-2 number, since 2×6940181² = 96332224625522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6940189) 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, 150851 + ... + 150896.

It is an arithmetic number, because the mean of its divisors is an integer number (1810488).

Almost surely, 2^6940181 is an apocalyptic number.

It is an amenable number.

6940181 is a deficient number, since it is larger than the sum of its proper divisors (301771).

6940181 is a wasteful number, since it uses less digits than its factorization.

6940181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301770.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 6940181 is about 2634.4223275701. The cubic root of 6940181 is about 190.7466556948.

The spelling of 6940181 in words is "six million, nine hundred forty thousand, one hundred eighty-one".