349515943 has 8 divisors (see below), whose sum is σ = 399588512. Its totient is φ = 299478816.

The previous prime is 349515913. The next prime is 349515961.

It is a happy number.

349515943 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 349515943 - 2¹³ = 349507751 is a prime.

It is a super-2 number, since 2×349515943² = 244322788822358498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 349515943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349515913) 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, 17521 + ... + 31717.

It is an arithmetic number, because the mean of its divisors is an integer number (49948564).

Almost surely, 2^349515943 is an apocalyptic number.

349515943 is a deficient number, since it is larger than the sum of its proper divisors (50072569).

349515943 is a wasteful number, since it uses less digits than its factorization.

349515943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721.

The product of its digits is 291600, while the sum is 43.

The square root of 349515943 is about 18695.3454902551. The cubic root of 349515943 is about 704.4048381473.

The spelling of 349515943 in words is "three hundred forty-nine million, five hundred fifteen thousand, nine hundred forty-three".