6940690 has 8 divisors (see below), whose sum is σ = 12493260. Its totient is φ = 2776272.

The previous prime is 6940679. The next prime is 6940691. The reversal of 6940690 is 960496.

It can be written as a sum of positive squares in 2 ways, for example, as 5793649 + 1147041 = 2407^2 + 1071^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6940690² = 96346355352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6940691) 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, 347025 + ... + 347044.

Almost surely, 2^6940690 is an apocalyptic number.

6940690 is a deficient number, since it is larger than the sum of its proper divisors (5552570).

6940690 is a wasteful number, since it uses less digits than its factorization.

6940690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694076.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 6940690 is about 2634.5189314180. The cubic root of 6940690 is about 190.7513187660.

It can be divided in two parts, 69406 and 90, that added together give a palindrome (69496).

The spelling of 6940690 in words is "six million, nine hundred forty thousand, six hundred ninety".