6900531639 has 4 divisors (see below), whose sum is σ = 9200708856. Its totient is φ = 4600354424.

The previous prime is 6900531637. The next prime is 6900531641. The reversal of 6900531639 is 9361350096.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6900531637) and next prime (6900531641).

It is a cyclic number.

It is not a de Polignac number, because 6900531639 - 2¹ = 6900531637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6900531639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6900531637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150088604 + ... + 1150088609.

It is an arithmetic number, because the mean of its divisors is an integer number (2300177214).

Almost surely, 2^6900531639 is an apocalyptic number.

6900531639 is a deficient number, since it is larger than the sum of its proper divisors (2300177217).

6900531639 is a wasteful number, since it uses less digits than its factorization.

6900531639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300177216.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 6900531639 is about 83069.4386582695. The cubic root of 6900531639 is about 1903.8271555275.

The spelling of 6900531639 in words is "six billion, nine hundred million, five hundred thirty-one thousand, six hundred thirty-nine".