350921993 has 4 divisors (see below), whose sum is σ = 359481108. Its totient is φ = 342362880.

The previous prime is 350921983. The next prime is 350922079. The reversal of 350921993 is 399129053.

It is a happy number.

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 165199609 + 185722384 = 12853^2 + 13628^2 .

It is a cyclic number.

It is not a de Polignac number, because 350921993 - 2¹⁴ = 350905609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 8559073 = 350921993 / (3 + 5 + 0 + 9 + 2 + 1 + 9 + 9 + 3).

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 350921993.

It is not an unprimeable number, because it can be changed into a prime (350921983) 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, 4279496 + ... + 4279577.

It is an arithmetic number, because the mean of its divisors is an integer number (89870277).

Almost surely, 2^350921993 is an apocalyptic number.

It is an amenable number.

350921993 is a deficient number, since it is larger than the sum of its proper divisors (8559115).

350921993 is an equidigital number, since it uses as much as digits as its factorization.

350921993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559114.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 350921993 is about 18732.9120266978. The cubic root of 350921993 is about 705.3481458733.

The spelling of 350921993 in words is "three hundred fifty million, nine hundred twenty-one thousand, nine hundred ninety-three".