349027009 has 4 divisors (see below), whose sum is σ = 350269380. Its totient is φ = 347784640.

The previous prime is 349026991. The next prime is 349027027. The reversal of 349027009 is 900720943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900720943 = 149 ⋅6045107.

It is an interprime number because it is at equal distance from previous prime (349026991) and next prime (349027027).

It can be written as a sum of positive squares in 2 ways, for example, as 115089984 + 233937025 = 10728^2 + 15295^2 .

It is a cyclic number.

It is not a de Polignac number, because 349027009 - 2²¹ = 346929857 is a prime.

It is a super-2 number, since 2×349027009² = 243639706022972162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349027039) 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, 620764 + ... + 621325.

It is an arithmetic number, because the mean of its divisors is an integer number (87567345).

Almost surely, 2^349027009 is an apocalyptic number.

It is an amenable number.

349027009 is a deficient number, since it is larger than the sum of its proper divisors (1242371).

349027009 is a wasteful number, since it uses less digits than its factorization.

349027009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242370.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 349027009 is about 18682.2645575958. The cubic root of 349027009 is about 704.0762234800.

The spelling of 349027009 in words is "three hundred forty-nine million, twenty-seven thousand, nine".