355640609 has 2 divisors, whose sum is σ = 355640610. Its totient is φ = 355640608.

The previous prime is 355640569. The next prime is 355640627. The reversal of 355640609 is 906046553.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352500625 + 3139984 = 18775^2 + 1772^2 .

It is a cyclic number.

It is not a de Polignac number, because 355640609 - 2⁸ = 355640353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (355640009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177820304 + 177820305.

It is an arithmetic number, because the mean of its divisors is an integer number (177820305).

Almost surely, 2^355640609 is an apocalyptic number.

It is an amenable number.

355640609 is a deficient number, since it is larger than the sum of its proper divisors (1).

355640609 is an equidigital number, since it uses as much as digits as its factorization.

355640609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 355640609 is about 18858.4360168069. The cubic root of 355640609 is about 708.4955308503.

The spelling of 355640609 in words is "three hundred fifty-five million, six hundred forty thousand, six hundred nine".