6913477021 has 4 divisors (see below), whose sum is σ = 7541974944. Its totient is φ = 6284979100.

The previous prime is 6913476937. The next prime is 6913477027. The reversal of 6913477021 is 1207743196.

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 6913477021 - 2²⁷ = 6779259293 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 (6913477027) 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, 314248945 + ... + 314248966.

It is an arithmetic number, because the mean of its divisors is an integer number (1885493736).

Almost surely, 2^6913477021 is an apocalyptic number.

It is an amenable number.

6913477021 is a deficient number, since it is larger than the sum of its proper divisors (628497923).

6913477021 is a wasteful number, since it uses less digits than its factorization.

6913477021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628497922.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 6913477021 is about 83147.3211895609. The cubic root of 6913477021 is about 1905.0169369974.

The spelling of 6913477021 in words is "six billion, nine hundred thirteen million, four hundred seventy-seven thousand, twenty-one".