349905971 has 4 divisors (see below), whose sum is σ = 350023344. Its totient is φ = 349788600.

The previous prime is 349905953. The next prime is 349905973. The reversal of 349905971 is 179509943.

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 349905971 - 2¹⁴ = 349889587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349905973) 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, 54095 + ... + 60216.

It is an arithmetic number, because the mean of its divisors is an integer number (87505836).

Almost surely, 2^349905971 is an apocalyptic number.

349905971 is a deficient number, since it is larger than the sum of its proper divisors (117373).

349905971 is a wasteful number, since it uses less digits than its factorization.

349905971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117372.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 349905971 is about 18705.7737343313. The cubic root of 349905971 is about 704.6667579872. Note that the first 3 decimals are identical.

The spelling of 349905971 in words is "three hundred forty-nine million, nine hundred five thousand, nine hundred seventy-one".