6902139669 has 4 divisors (see below), whose sum is σ = 9202852896. Its totient is φ = 4601426444.

The previous prime is 6902139649. The next prime is 6902139679. The reversal of 6902139669 is 9669312096.

It is a happy number.

6902139669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6902139669 - 2¹¹ = 6902137621 is a prime.

It is a super-2 number, since 2×6902139669² = 95279064020766859122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6902139619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150356609 + ... + 1150356614.

It is an arithmetic number, because the mean of its divisors is an integer number (2300713224).

Almost surely, 2^6902139669 is an apocalyptic number.

It is an amenable number.

6902139669 is a deficient number, since it is larger than the sum of its proper divisors (2300713227).

6902139669 is a wasteful number, since it uses less digits than its factorization.

6902139669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300713226.

The product of its (nonzero) digits is 944784, while the sum is 51.

The square root of 6902139669 is about 83079.1169247724. The cubic root of 6902139669 is about 1903.9750269076.

The spelling of 6902139669 in words is "six billion, nine hundred two million, one hundred thirty-nine thousand, six hundred sixty-nine".