6969639 has 4 divisors (see below), whose sum is σ = 9292856. Its totient is φ = 4646424.

The previous prime is 6969629. The next prime is 6969647. The reversal of 6969639 is 9369696.

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

It is not a de Polignac number, because 6969639 - 2⁵ = 6969607 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

6969639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6969619) 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, 1161604 + ... + 1161609.

It is an arithmetic number, because the mean of its divisors is an integer number (2323214).

Almost surely, 2^6969639 is an apocalyptic number.

6969639 is a deficient number, since it is larger than the sum of its proper divisors (2323217).

6969639 is a wasteful number, since it uses less digits than its factorization.

6969639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323216.

The product of its digits is 472392, while the sum is 48.

The square root of 6969639 is about 2640.0073863533. The cubic root of 6969639 is about 191.0161531618.

The spelling of 6969639 in words is "six million, nine hundred sixty-nine thousand, six hundred thirty-nine".