8132920409 has 2 divisors, whose sum is σ = 8132920410. Its totient is φ = 8132920408.

The previous prime is 8132920381. The next prime is 8132920427. The reversal of 8132920409 is 9040292318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4091521225 + 4041399184 = 63965^2 + 63572^2 .

It is a cyclic number.

It is not a de Polignac number, because 8132920409 - 2²⁰ = 8131871833 is a prime.

It is a super-2 number, since 2×8132920409² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8132920459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4066460204 + 4066460205.

It is an arithmetic number, because the mean of its divisors is an integer number (4066460205).

Almost surely, 2^8132920409 is an apocalyptic number.

It is an amenable number.

8132920409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8132920409 is an equidigital number, since it uses as much as digits as its factorization.

8132920409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 8132920409 is about 90182.7057090216. The cubic root of 8132920409 is about 2011.0159141687.

The spelling of 8132920409 in words is "eight billion, one hundred thirty-two million, nine hundred twenty thousand, four hundred nine".