353987 has 4 divisors (see below), whose sum is σ = 360720. Its totient is φ = 347256.

The previous prime is 353963. The next prime is 354001. The reversal of 353987 is 789353.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 789353 = 31 ⋅25463.

It is a de Polignac number, because none of the positive numbers 2^k-353987 is a prime.

It is a d-powerful number, because it can be written as 3¹⁰ + 5³ + 9 + 3¹¹ + 8 + 7⁶ .

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 353987.

It is not an unprimeable number, because it can be changed into a prime (353917) 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, 3287 + ... + 3392.

It is an arithmetic number, because the mean of its divisors is an integer number (90180).

2³⁵³⁹⁸⁷ is an apocalyptic number.

353987 is a deficient number, since it is larger than the sum of its proper divisors (6733).

353987 is an equidigital number, since it uses as much as digits as its factorization.

353987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732.

The product of its digits is 22680, while the sum is 35.

The square root of 353987 is about 594.9680663700. The cubic root of 353987 is about 70.7395736029.

The spelling of 353987 in words is "three hundred fifty-three thousand, nine hundred eighty-seven".