7153421809 has 2 divisors, whose sum is σ = 7153421810. Its totient is φ = 7153421808.

The previous prime is 7153421801. The next prime is 7153421813. The reversal of 7153421809 is 9081243517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7144982784 + 8439025 = 84528^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 7153421809 - 2³ = 7153421801 is a prime.

It is not a weakly prime, because it can be changed into another prime (7153421801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3576710904 + 3576710905.

It is an arithmetic number, because the mean of its divisors is an integer number (3576710905).

Almost surely, 2^7153421809 is an apocalyptic number.

It is an amenable number.

7153421809 is a deficient number, since it is larger than the sum of its proper divisors (1).

7153421809 is an equidigital number, since it uses as much as digits as its factorization.

7153421809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 7153421809 is about 84577.9037869821. The cubic root of 7153421809 is about 1926.8057994128.

The spelling of 7153421809 in words is "seven billion, one hundred fifty-three million, four hundred twenty-one thousand, eight hundred nine".