6909249477 has 12 divisors (see below), whose sum is σ = 9975485184. Its totient is φ = 4251845520.

The previous prime is 6909249437. The next prime is 6909249481. The reversal of 6909249477 is 7749429096.

It is not a de Polignac number, because 6909249477 - 2²⁷ = 6775031749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6909249437) 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 11 ways as a sum of consecutive naturals, for example, 6813349 + ... + 6814362.

It is an arithmetic number, because the mean of its divisors is an integer number (831290432).

Almost surely, 2^6909249477 is an apocalyptic number.

It is an amenable number.

6909249477 is a deficient number, since it is larger than the sum of its proper divisors (3066235707).

6909249477 is a wasteful number, since it uses less digits than its factorization.

6909249477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13627740 (or 13627727 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 57.

The square root of 6909249477 is about 83121.8952923957. The cubic root of 6909249477 is about 1904.6285562054.

The spelling of 6909249477 in words is "six billion, nine hundred nine million, two hundred forty-nine thousand, four hundred seventy-seven".