349573129 has 4 divisors (see below), whose sum is σ = 354361876. Its totient is φ = 344784384.

The previous prime is 349573123. The next prime is 349573139. The reversal of 349573129 is 921375943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 921375943 = 13723 ⋅67141.

It can be written as a sum of positive squares in 2 ways, for example, as 131331600 + 218241529 = 11460^2 + 14773^2 .

It is a cyclic number.

It is not a de Polignac number, because 349573129 - 2⁹ = 349572617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349573123) 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, 2394264 + ... + 2394409.

It is an arithmetic number, because the mean of its divisors is an integer number (88590469).

Almost surely, 2^349573129 is an apocalyptic number.

It is an amenable number.

349573129 is a deficient number, since it is larger than the sum of its proper divisors (4788747).

349573129 is an equidigital number, since it uses as much as digits as its factorization.

349573129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788746.

The product of its digits is 204120, while the sum is 43.

The square root of 349573129 is about 18696.8748458131. The cubic root of 349573129 is about 704.4432530839.

The spelling of 349573129 in words is "three hundred forty-nine million, five hundred seventy-three thousand, one hundred twenty-nine".