958409 has 4 divisors (see below), whose sum is σ = 1014804. Its totient is φ = 902016.

The previous prime is 958393. The next prime is 958423. The reversal of 958409 is 904859.

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 313600 + 644809 = 560^2 + 803^2 .

It is a cyclic number.

It is not a de Polignac number, because 958409 - 2⁴ = 958393 is a prime.

It is a super-2 number, since 2×958409² = 1837095622562, which contains 22 as substring.

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 958409.

It is not an unprimeable number, because it can be changed into a prime (958439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28172 + ... + 28205.

It is an arithmetic number, because the mean of its divisors is an integer number (253701).

2⁹⁵⁸⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

958409 is a deficient number, since it is larger than the sum of its proper divisors (56395).

958409 is a wasteful number, since it uses less digits than its factorization.

958409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56394.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 958409 is about 978.9836566562. The cubic root of 958409 is about 98.5939564037.

The spelling of 958409 in words is "nine hundred fifty-eight thousand, four hundred nine".