349641389 has 4 divisors (see below), whose sum is σ = 350158524. Its totient is φ = 349124256.

The previous prime is 349641373. The next prime is 349641403. The reversal of 349641389 is 983146943.

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 321018889 + 28622500 = 17917^2 + 5350^2 .

It is a cyclic number.

It is not a de Polignac number, because 349641389 - 2⁴ = 349641373 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 (349641349) 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, 257552 + ... + 258905.

It is an arithmetic number, because the mean of its divisors is an integer number (87539631).

Almost surely, 2^349641389 is an apocalyptic number.

It is an amenable number.

349641389 is a deficient number, since it is larger than the sum of its proper divisors (517135).

349641389 is an equidigital number, since it uses as much as digits as its factorization.

349641389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517134.

The product of its digits is 559872, while the sum is 47.

The square root of 349641389 is about 18698.7001954681. The cubic root of 349641389 is about 704.4891015421.

The spelling of 349641389 in words is "three hundred forty-nine million, six hundred forty-one thousand, three hundred eighty-nine".