6939545 has 8 divisors (see below), whose sum is σ = 8348424. Its totient is φ = 5537664.

The previous prime is 6939533. The next prime is 6939551. The reversal of 6939545 is 5459396.

It can be written as a sum of positive squares in 4 ways, for example, as 3003289 + 3936256 = 1733^2 + 1984^2 .

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 6939545 - 2⁴ = 6939529 is a prime.

It is a Duffinian number.

It is a Curzon 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, 767 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (1043553).

Almost surely, 2^6939545 is an apocalyptic number.

It is an amenable number.

6939545 is a deficient number, since it is larger than the sum of its proper divisors (1408879).

6939545 is a wasteful number, since it uses less digits than its factorization.

6939545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499.

The product of its digits is 145800, while the sum is 41.

The square root of 6939545 is about 2634.3016152294. The cubic root of 6939545 is about 190.7408288257.

The spelling of 6939545 in words is "six million, nine hundred thirty-nine thousand, five hundred forty-five".