349989953 has 4 divisors (see below), whose sum is σ = 353200980. Its totient is φ = 346778928.

The previous prime is 349989911. The next prime is 349989967. The reversal of 349989953 is 359989943.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222367744 + 127622209 = 14912^2 + 11297^2 .

It is a cyclic number.

It is not a de Polignac number, because 349989953 - 2¹⁰ = 349988929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 349989892 and 349989901.

It is not an unprimeable number, because it can be changed into a prime (349989853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605350 + ... + 1605567.

It is an arithmetic number, because the mean of its divisors is an integer number (88300245).

Almost surely, 2^349989953 is an apocalyptic number.

It is an amenable number.

349989953 is a deficient number, since it is larger than the sum of its proper divisors (3211027).

349989953 is a wasteful number, since it uses less digits than its factorization.

349989953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3211026.

The product of its digits is 9447840, while the sum is 59.

The square root of 349989953 is about 18708.0184145729. The cubic root of 349989953 is about 704.7231298838.

The spelling of 349989953 in words is "three hundred forty-nine million, nine hundred eighty-nine thousand, nine hundred fifty-three".