984406405 has 4 divisors (see below), whose sum is σ = 1181287692. Its totient is φ = 787525120.

The previous prime is 984406309. The next prime is 984406441. The reversal of 984406405 is 504604489.

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 183629601 + 800776804 = 13551^2 + 28298^2 .

It is not a de Polignac number, because 984406405 - 2¹¹ = 984404357 is a prime.

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, 98440636 + ... + 98440645.

It is an arithmetic number, because the mean of its divisors is an integer number (295321923).

Almost surely, 2^984406405 is an apocalyptic number.

It is an amenable number.

984406405 is a deficient number, since it is larger than the sum of its proper divisors (196881287).

984406405 is a wasteful number, since it uses less digits than its factorization.

984406405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196881286.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 984406405 is about 31375.2514730958. The cubic root of 984406405 is about 994.7748806799.

The spelling of 984406405 in words is "nine hundred eighty-four million, four hundred six thousand, four hundred five".