349731893 has 8 divisors (see below), whose sum is σ = 405659712. Its totient is φ = 295295616.

The previous prime is 349731869. The next prime is 349731911. The reversal of 349731893 is 398137943.

It is a happy number.

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

It is not a de Polignac number, because 349731893 - 2¹⁰ = 349730869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349731493) 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, 372380 + ... + 373317.

It is an arithmetic number, because the mean of its divisors is an integer number (50707464).

Almost surely, 2^349731893 is an apocalyptic number.

It is an amenable number.

349731893 is a deficient number, since it is larger than the sum of its proper divisors (55927819).

349731893 is an equidigital number, since it uses as much as digits as its factorization.

349731893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745771.

The product of its digits is 489888, while the sum is 47.

The square root of 349731893 is about 18701.1201001437. The cubic root of 349731893 is about 704.5498815138.

The spelling of 349731893 in words is "three hundred forty-nine million, seven hundred thirty-one thousand, eight hundred ninety-three".