353144993 has 4 divisors (see below), whose sum is σ = 353522820. Its totient is φ = 352767168.

The previous prime is 353144959. The next prime is 353145041. The reversal of 353144993 is 399441353.

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 168402529 + 184742464 = 12977^2 + 13592^2 .

It is a cyclic number.

It is not a de Polignac number, because 353144993 - 2²⁰ = 352096417 is a prime.

It is a super-2 number, since 2×353144993² = 249422772161940098, 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 353144993.

It is not an unprimeable number, because it can be changed into a prime (353144923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187508 + ... + 189381.

It is an arithmetic number, because the mean of its divisors is an integer number (88380705).

Almost surely, 2^353144993 is an apocalyptic number.

It is an amenable number.

353144993 is a deficient number, since it is larger than the sum of its proper divisors (377827).

353144993 is an equidigital number, since it uses as much as digits as its factorization.

353144993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377826.

The product of its digits is 174960, while the sum is 41.

The square root of 353144993 is about 18792.1524312677. The cubic root of 353144993 is about 706.8344112238.

The spelling of 353144993 in words is "three hundred fifty-three million, one hundred forty-four thousand, nine hundred ninety-three".