998327405 has 4 divisors (see below), whose sum is σ = 1197992892. Its totient is φ = 798661920.

The previous prime is 998327399. The next prime is 998327461. The reversal of 998327405 is 504723899.

It is a happy number.

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 109035364 + 889292041 = 10442^2 + 29821^2 .

It is a de Polignac number, because none of the positive numbers 2^k-998327405 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 998327405.

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, 99832736 + ... + 99832745.

It is an arithmetic number, because the mean of its divisors is an integer number (299498223).

Almost surely, 2^998327405 is an apocalyptic number.

It is an amenable number.

998327405 is a deficient number, since it is larger than the sum of its proper divisors (199665487).

998327405 is a wasteful number, since it uses less digits than its factorization.

998327405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199665486.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 998327405 is about 31596.3194850286. The cubic root of 998327405 is about 999.4421572026.

The spelling of 998327405 in words is "nine hundred ninety-eight million, three hundred twenty-seven thousand, four hundred five".