998133401 has 4 divisors (see below), whose sum is σ = 999686352. Its totient is φ = 996580452.

The previous prime is 998133373. The next prime is 998133413. The reversal of 998133401 is 104331899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 998133401 - 2¹⁴ = 998117017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998133421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775511 + ... + 776796.

It is an arithmetic number, because the mean of its divisors is an integer number (249921588).

Almost surely, 2^998133401 is an apocalyptic number.

It is an amenable number.

998133401 is a deficient number, since it is larger than the sum of its proper divisors (1552951).

998133401 is a wasteful number, since it uses less digits than its factorization.

998133401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552950.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 998133401 is about 31593.2492947465. The cubic root of 998133401 is about 999.3774127990.

The spelling of 998133401 in words is "nine hundred ninety-eight million, one hundred thirty-three thousand, four hundred one".