349831019 has 4 divisors (see below), whose sum is σ = 349897296. Its totient is φ = 349764744.

The previous prime is 349830961. The next prime is 349831033. The reversal of 349831019 is 910138943.

It is a happy number.

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 349831019 - 2²⁴ = 333053803 is a prime.

It is a super-2 number, since 2×349831019² = 244763483709156722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349131019) 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, 24464 + ... + 36029.

It is an arithmetic number, because the mean of its divisors is an integer number (87474324).

Almost surely, 2^349831019 is an apocalyptic number.

349831019 is a deficient number, since it is larger than the sum of its proper divisors (66277).

349831019 is an equidigital number, since it uses as much as digits as its factorization.

349831019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66276.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 349831019 is about 18703.7701814367. The cubic root of 349831019 is about 704.6164397504.

The spelling of 349831019 in words is "three hundred forty-nine million, eight hundred thirty-one thousand, nineteen".