998642593 has 8 divisors (see below), whose sum is σ = 1075729536. Its totient is φ = 921594000.

The previous prime is 998642569. The next prime is 998642597. The reversal of 998642593 is 395246899.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 998642593 - 2²¹ = 996545441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998642597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67518 + ... + 80968.

It is an arithmetic number, because the mean of its divisors is an integer number (134466192).

Almost surely, 2^998642593 is an apocalyptic number.

It is an amenable number.

998642593 is a deficient number, since it is larger than the sum of its proper divisors (77086943).

998642593 is a wasteful number, since it uses less digits than its factorization.

998642593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19175.

The product of its digits is 4199040, while the sum is 55.

The square root of 998642593 is about 31601.3068242438. The cubic root of 998642593 is about 999.5473261173.

The spelling of 998642593 in words is "nine hundred ninety-eight million, six hundred forty-two thousand, five hundred ninety-three".