350343721 has 16 divisors (see below), whose sum is σ = 432125568. Its totient is φ = 276595200.

The previous prime is 350343709. The next prime is 350343739. The reversal of 350343721 is 127343053.

It is a de Polignac number, because none of the positive numbers 2^k-350343721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 350343721.

It is not an unprimeable number, because it can be changed into a prime (350343221) 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 15 ways as a sum of consecutive naturals, for example, 40761 + ... + 48601.

It is an arithmetic number, because the mean of its divisors is an integer number (27007848).

Almost surely, 2^350343721 is an apocalyptic number.

It is an amenable number.

350343721 is a deficient number, since it is larger than the sum of its proper divisors (81781847).

350343721 is a wasteful number, since it uses less digits than its factorization.

350343721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8352.

The product of its (nonzero) digits is 7560, while the sum is 28.

The square root of 350343721 is about 18717.4710097278. The cubic root of 350343721 is about 704.9604934018.

Adding to 350343721 its reverse (127343053), we get a palindrome (477686774).

The spelling of 350343721 in words is "three hundred fifty million, three hundred forty-three thousand, seven hundred twenty-one".