358991 has 4 divisors (see below), whose sum is σ = 371400. Its totient is φ = 346584.

The previous prime is 358987. The next prime is 358993. The reversal of 358991 is 199853.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 358991 - 2² = 358987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (358993) 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, 6161 + ... + 6218.

It is an arithmetic number, because the mean of its divisors is an integer number (92850).

2³⁵⁸⁹⁹¹ is an apocalyptic number.

358991 is a deficient number, since it is larger than the sum of its proper divisors (12409).

358991 is a wasteful number, since it uses less digits than its factorization.

358991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12408.

The product of its digits is 9720, while the sum is 35.

The square root of 358991 is about 599.1585766723. The cubic root of 358991 is about 71.0713426909.

The spelling of 358991 in words is "three hundred fifty-eight thousand, nine hundred ninety-one".