349409407 has 4 divisors (see below), whose sum is σ = 349831720. Its totient is φ = 348987096.

The previous prime is 349409383. The next prime is 349409441. The reversal of 349409407 is 704904943.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 349409407 - 2²⁷ = 215191679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 349409407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349409477) 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, 209913 + ... + 211570.

It is an arithmetic number, because the mean of its divisors is an integer number (87457930).

Almost surely, 2^349409407 is an apocalyptic number.

349409407 is a deficient number, since it is larger than the sum of its proper divisors (422313).

349409407 is an equidigital number, since it uses as much as digits as its factorization.

349409407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422312.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 349409407 is about 18692.4960077567. The cubic root of 349409407 is about 704.3332609643. Note that the first 3 decimals are identical.

The spelling of 349409407 in words is "three hundred forty-nine million, four hundred nine thousand, four hundred seven".