6931945 has 8 divisors (see below), whose sum is σ = 8334144. Its totient is φ = 5535024.

The previous prime is 6931919. The next prime is 6931961. The reversal of 6931945 is 5491396.

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

It is a cyclic number.

It is not a de Polignac number, because 6931945 - 2¹³ = 6923753 is a prime.

It is a super-2 number, since 2×6931945² = 96103722966050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2682 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (1041768).

Almost surely, 2^6931945 is an apocalyptic number.

It is an amenable number.

6931945 is a deficient number, since it is larger than the sum of its proper divisors (1402199).

6931945 is a wasteful number, since it uses less digits than its factorization.

6931945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639.

The product of its digits is 29160, while the sum is 37.

The square root of 6931945 is about 2632.8587125024. The cubic root of 6931945 is about 190.6711720101.

The spelling of 6931945 in words is "six million, nine hundred thirty-one thousand, nine hundred forty-five".