353981 has 4 divisors (see below), whose sum is σ = 355200. Its totient is φ = 352764.

The previous prime is 353963. The next prime is 354001. The reversal of 353981 is 189353.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 353981 - 2⁶ = 353917 is a prime.

It is a super-2 number, since 2×353981² = 250605096722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 353981.

It is not an unprimeable number, because it can be changed into a prime (353911) 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, 110 + ... + 848.

It is an arithmetic number, because the mean of its divisors is an integer number (88800).

2³⁵³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

353981 is a deficient number, since it is larger than the sum of its proper divisors (1219).

353981 is an equidigital number, since it uses as much as digits as its factorization.

353981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218.

The product of its digits is 3240, while the sum is 29.

The square root of 353981 is about 594.9630240612. The cubic root of 353981 is about 70.7391739273.

The spelling of 353981 in words is "three hundred fifty-three thousand, nine hundred eighty-one".