998612401 has 4 divisors (see below), whose sum is σ = 998675812. Its totient is φ = 998548992.

The previous prime is 998612399. The next prime is 998612429. The reversal of 998612401 is 104216899.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 915365025 + 83247376 = 30255^2 + 9124^2 .

It is a cyclic number.

It is not a de Polignac number, because 998612401 - 2¹ = 998612399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998612471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12001 + ... + 46273.

It is an arithmetic number, because the mean of its divisors is an integer number (249668953).

Almost surely, 2^998612401 is an apocalyptic number.

It is an amenable number.

998612401 is a deficient number, since it is larger than the sum of its proper divisors (63411).

998612401 is a wasteful number, since it uses less digits than its factorization.

998612401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63410.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 998612401 is about 31600.8291188697. The cubic root of 998612401 is about 999.5372528981.

The spelling of 998612401 in words is "nine hundred ninety-eight million, six hundred twelve thousand, four hundred one".