355979389 has 2 divisors, whose sum is σ = 355979390. Its totient is φ = 355979388.

The previous prime is 355979387. The next prime is 355979431. The reversal of 355979389 is 983979553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274167364 + 81812025 = 16558^2 + 9045^2 .

It is a cyclic number.

It is not a de Polignac number, because 355979389 - 2¹ = 355979387 is a prime.

Together with 355979387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (355979381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177989694 + 177989695.

It is an arithmetic number, because the mean of its divisors is an integer number (177989695).

Almost surely, 2^355979389 is an apocalyptic number.

It is an amenable number.

355979389 is a deficient number, since it is larger than the sum of its proper divisors (1).

355979389 is an equidigital number, since it uses as much as digits as its factorization.

355979389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9185400, while the sum is 58.

The square root of 355979389 is about 18867.4160657998. The cubic root of 355979389 is about 708.7204282469.

The spelling of 355979389 in words is "three hundred fifty-five million, nine hundred seventy-nine thousand, three hundred eighty-nine".