355042609 has 4 divisors (see below), whose sum is σ = 356362740. Its totient is φ = 353722480.

The previous prime is 355042577. The next prime is 355042663. The reversal of 355042609 is 906240553.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906240553 = 16741 ⋅54133.

It can be written as a sum of positive squares in 2 ways, for example, as 194463025 + 160579584 = 13945^2 + 12672^2 .

It is a cyclic number.

It is not a de Polignac number, because 355042609 - 2⁵ = 355042577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355042109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 659662 + ... + 660199.

It is an arithmetic number, because the mean of its divisors is an integer number (89090685).

Almost surely, 2^355042609 is an apocalyptic number.

It is an amenable number.

355042609 is a deficient number, since it is larger than the sum of its proper divisors (1320131).

355042609 is a wasteful number, since it uses less digits than its factorization.

355042609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320130.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 355042609 is about 18842.5743729460. The cubic root of 355042609 is about 708.0982027539.

The spelling of 355042609 in words is "three hundred fifty-five million, forty-two thousand, six hundred nine".