355109989 has 4 divisors (see below), whose sum is σ = 382426156. Its totient is φ = 327793824.

The previous prime is 355109971. The next prime is 355110001. The reversal of 355109989 is 989901553.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143640225 + 211469764 = 11985^2 + 14542^2 .

It is a cyclic number.

It is not a de Polignac number, because 355109989 - 2⁷ = 355109861 is a prime.

It is a super-2 number, since 2×355109989² = 252206208575160242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355109789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13658064 + ... + 13658089.

It is an arithmetic number, because the mean of its divisors is an integer number (95606539).

Almost surely, 2^355109989 is an apocalyptic number.

It is an amenable number.

355109989 is a deficient number, since it is larger than the sum of its proper divisors (27316167).

355109989 is a wasteful number, since it uses less digits than its factorization.

355109989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27316166.

The product of its (nonzero) digits is 437400, while the sum is 49.

The square root of 355109989 is about 18844.3622603685. The cubic root of 355109989 is about 708.1429942219.

The spelling of 355109989 in words is "three hundred fifty-five million, one hundred nine thousand, nine hundred eighty-nine".