350172985 has 4 divisors (see below), whose sum is σ = 420207588. Its totient is φ = 280138384.

The previous prime is 350172971. The next prime is 350172997. The reversal of 350172985 is 589271053.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589271053 = 7 ⋅84181579.

It can be written as a sum of positive squares in 2 ways, for example, as 168246841 + 181926144 = 12971^2 + 13488^2 .

It is a cyclic number.

It is not a de Polignac number, because 350172985 - 2¹¹ = 350170937 is a prime.

It is a super-2 number, since 2×350172985² = 245242238847620450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35017294 + ... + 35017303.

It is an arithmetic number, because the mean of its divisors is an integer number (105051897).

Almost surely, 2^350172985 is an apocalyptic number.

It is an amenable number.

350172985 is a deficient number, since it is larger than the sum of its proper divisors (70034603).

350172985 is an equidigital number, since it uses as much as digits as its factorization.

350172985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70034602.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 350172985 is about 18712.9095813559. The cubic root of 350172985 is about 704.8459566528.

The spelling of 350172985 in words is "three hundred fifty million, one hundred seventy-two thousand, nine hundred eighty-five".