355109509 has 2 divisors, whose sum is σ = 355109510. Its totient is φ = 355109508.

The previous prime is 355109507. The next prime is 355109519. The reversal of 355109509 is 905901553.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244922500 + 110187009 = 15650^2 + 10497^2 .

It is a cyclic number.

It is not a de Polignac number, because 355109509 - 2¹ = 355109507 is a prime.

It is a super-2 number, since 2×355109509² = 252205526764442162, which contains 22 as substring.

Together with 355109507, 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 (355109501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177554754 + 177554755.

It is an arithmetic number, because the mean of its divisors is an integer number (177554755).

Almost surely, 2^355109509 is an apocalyptic number.

It is an amenable number.

355109509 is a deficient number, since it is larger than the sum of its proper divisors (1).

355109509 is an equidigital number, since it uses as much as digits as its factorization.

355109509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30375, while the sum is 37.

The square root of 355109509 is about 18844.3495244596. The cubic root of 355109509 is about 708.1426751576.

The spelling of 355109509 in words is "three hundred fifty-five million, one hundred nine thousand, five hundred nine".