349436729 has 4 divisors (see below), whose sum is σ = 351247476. Its totient is φ = 347625984.

The previous prime is 349436719. The next prime is 349436753. The reversal of 349436729 is 927634943.

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 133934329 + 215502400 = 11573^2 + 14680^2 .

It is a cyclic number.

It is not a de Polignac number, because 349436729 - 2⁴ = 349436713 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349436719) 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, 905084 + ... + 905469.

It is an arithmetic number, because the mean of its divisors is an integer number (87811869).

Almost surely, 2^349436729 is an apocalyptic number.

It is an amenable number.

349436729 is a deficient number, since it is larger than the sum of its proper divisors (1810747).

349436729 is a wasteful number, since it uses less digits than its factorization.

349436729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810746.

The product of its digits is 979776, while the sum is 47.

The square root of 349436729 is about 18693.2268214987. The cubic root of 349436729 is about 704.3516188861.

The spelling of 349436729 in words is "three hundred forty-nine million, four hundred thirty-six thousand, seven hundred twenty-nine".