349665819 has 4 divisors (see below), whose sum is σ = 466221096. Its totient is φ = 233110544.

The previous prime is 349665817. The next prime is 349665829. The reversal of 349665819 is 918566943.

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 349665819 - 2¹ = 349665817 is a prime.

It is a super-2 number, since 2×349665819² = 244532369953881522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (349665817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58277634 + ... + 58277639.

It is an arithmetic number, because the mean of its divisors is an integer number (116555274).

Almost surely, 2^349665819 is an apocalyptic number.

349665819 is a deficient number, since it is larger than the sum of its proper divisors (116555277).

349665819 is a wasteful number, since it uses less digits than its factorization.

349665819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116555276.

The product of its digits is 1399680, while the sum is 51.

The square root of 349665819 is about 18699.3534380203. The cubic root of 349665819 is about 704.5055090847.

The spelling of 349665819 in words is "three hundred forty-nine million, six hundred sixty-five thousand, eight hundred nineteen".