9958405 has 4 divisors (see below), whose sum is σ = 11950092. Its totient is φ = 7966720.

The previous prime is 9958363. The next prime is 9958453. The reversal of 9958405 is 5048599.

9958405 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 7496644 + 2461761 = 2738^2 + 1569^2 .

It is not a de Polignac number, because 9958405 - 2¹¹ = 9956357 is a prime.

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 a congruent 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, 995836 + ... + 995845.

It is an arithmetic number, because the mean of its divisors is an integer number (2987523).

Almost surely, 2^9958405 is an apocalyptic number.

It is an amenable number.

9958405 is a deficient number, since it is larger than the sum of its proper divisors (1991687).

9958405 is a wasteful number, since it uses less digits than its factorization.

9958405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991686.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 9958405 is about 3155.6940599494. The cubic root of 9958405 is about 215.1443415090.

The spelling of 9958405 in words is "nine million, nine hundred fifty-eight thousand, four hundred five".