343603661 has 4 divisors (see below), whose sum is σ = 343653372. Its totient is φ = 343553952.

The previous prime is 343603651. The next prime is 343603679. The reversal of 343603661 is 166306343.

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 317908900 + 25694761 = 17830^2 + 5069^2 .

It is a cyclic number.

It is not a de Polignac number, because 343603661 - 2¹⁸ = 343341517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343603621) 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, 12410 + ... + 29003.

It is an arithmetic number, because the mean of its divisors is an integer number (85913343).

Almost surely, 2^343603661 is an apocalyptic number.

It is an amenable number.

343603661 is a deficient number, since it is larger than the sum of its proper divisors (49711).

343603661 is an equidigital number, since it uses as much as digits as its factorization.

343603661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49710.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 343603661 is about 18536.5493282865. The cubic root of 343603661 is about 700.4104130675.

The spelling of 343603661 in words is "three hundred forty-three million, six hundred three thousand, six hundred sixty-one".