6940631 has 4 divisors (see below), whose sum is σ = 7088352. Its totient is φ = 6792912.

The previous prime is 6940589. The next prime is 6940639. The reversal of 6940631 is 1360496.

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 6940631 - 2²² = 2746327 is a prime.

It is a super-2 number, since 2×6940631² = 96344717356322, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 6940594 and 6940603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6940639) 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, 73790 + ... + 73883.

It is an arithmetic number, because the mean of its divisors is an integer number (1772088).

Almost surely, 2^6940631 is an apocalyptic number.

6940631 is a deficient number, since it is larger than the sum of its proper divisors (147721).

6940631 is a wasteful number, since it uses less digits than its factorization.

6940631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147720.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 6940631 is about 2634.5077339040. The cubic root of 6940631 is about 190.7507782645.

The spelling of 6940631 in words is "six million, nine hundred forty thousand, six hundred thirty-one".