6940393 has 4 divisors (see below), whose sum is σ = 6956928. Its totient is φ = 6923860.

The previous prime is 6940391. The next prime is 6940399. The reversal of 6940393 is 3930496.

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 6940393 - 2¹ = 6940391 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6940391) 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, 7621 + ... + 8482.

It is an arithmetic number, because the mean of its divisors is an integer number (1739232).

Almost surely, 2^6940393 is an apocalyptic number.

It is an amenable number.

6940393 is a deficient number, since it is larger than the sum of its proper divisors (16535).

6940393 is a wasteful number, since it uses less digits than its factorization.

6940393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16534.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 6940393 is about 2634.4625637879. The cubic root of 6940393 is about 190.7485979054.

It can be divided in two parts, 69403 and 93, that added together give a palindrome (69496).

The spelling of 6940393 in words is "six million, nine hundred forty thousand, three hundred ninety-three".