1355020393 has 2 divisors, whose sum is σ = 1355020394. Its totient is φ = 1355020392.

The previous prime is 1355020391. The next prime is 1355020409. The reversal of 1355020393 is 3930205531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1344542224 + 10478169 = 36668^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355020393 - 2¹ = 1355020391 is a prime.

Together with 1355020391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1355020391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677510196 + 677510197.

It is an arithmetic number, because the mean of its divisors is an integer number (677510197).

Almost surely, 2^1355020393 is an apocalyptic number.

It is an amenable number.

1355020393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355020393 is an equidigital number, since it uses as much as digits as its factorization.

1355020393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 1355020393 is about 36810.6016386584. The cubic root of 1355020393 is about 1106.5777759907.

The spelling of 1355020393 in words is "one billion, three hundred fifty-five million, twenty thousand, three hundred ninety-three".