6909153421 has 2 divisors, whose sum is σ = 6909153422. Its totient is φ = 6909153420.

The previous prime is 6909153403. The next prime is 6909153457. The reversal of 6909153421 is 1243519096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5552336196 + 1356817225 = 74514^2 + 36835^2 .

It is a cyclic number.

It is not a de Polignac number, because 6909153421 - 2⁹ = 6909152909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6909153721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454576710 + 3454576711.

It is an arithmetic number, because the mean of its divisors is an integer number (3454576711).

Almost surely, 2^6909153421 is an apocalyptic number.

It is an amenable number.

6909153421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6909153421 is an equidigital number, since it uses as much as digits as its factorization.

6909153421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 6909153421 is about 83121.3174883555. The cubic root of 6909153421 is about 1904.6197297837.

The spelling of 6909153421 in words is "six billion, nine hundred nine million, one hundred fifty-three thousand, four hundred twenty-one".