349673521 has 8 divisors (see below), whose sum is σ = 361490688. Its totient is φ = 337890000.

The previous prime is 349673501. The next prime is 349673537. The reversal of 349673521 is 125376943.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 349673521 - 2¹⁹ = 349149233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349673501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13686 + ... + 29776.

It is an arithmetic number, because the mean of its divisors is an integer number (45186336).

Almost surely, 2^349673521 is an apocalyptic number.

349673521 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

349673521 is a deficient number, since it is larger than the sum of its proper divisors (11817167).

349673521 is a wasteful number, since it uses less digits than its factorization.

349673521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16823.

The product of its digits is 136080, while the sum is 40.

The square root of 349673521 is about 18699.5593798357. The cubic root of 349673521 is about 704.5106817012.

The spelling of 349673521 in words is "three hundred forty-nine million, six hundred seventy-three thousand, five hundred twenty-one".