6958639 has 4 divisors (see below), whose sum is σ = 7056720. Its totient is φ = 6860560.

The previous prime is 6958621. The next prime is 6958649. The reversal of 6958639 is 9368596.

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 6958639 - 2¹⁷ = 6827567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6958619) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 48934 + ... + 49075.

It is an arithmetic number, because the mean of its divisors is an integer number (1764180).

Almost surely, 2^6958639 is an apocalyptic number.

6958639 is a deficient number, since it is larger than the sum of its proper divisors (98081).

6958639 is an equidigital number, since it uses as much as digits as its factorization.

6958639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98080.

The product of its digits is 349920, while the sum is 46.

The square root of 6958639 is about 2637.9232361841. The cubic root of 6958639 is about 190.9156083050.

The spelling of 6958639 in words is "six million, nine hundred fifty-eight thousand, six hundred thirty-nine".