998716429762297 has 4 divisors (see below), whose sum is σ = 998716494270580. Its totient is φ = 998716365254016.

The previous prime is 998716429762279. The next prime is 998716429762307. The reversal of 998716429762297 is 792267924617899.

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 130331540368656 + 868384889393641 = 11416284^2 + 29468371^2 .

It is a 3-Lehmer number, since φ(998716429762297) divides (998716429762297-1)³.

It is a cyclic number.

It is not a de Polignac number, because 998716429762297 - 2⁷ = 998716429762169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998716429762097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450829 + ... + 45155797.

It is an arithmetic number, because the mean of its divisors is an integer number (249679123567645).

It is a Poulet number, since it divides 2^{998716429762296}-1.

Almost surely, 2^{998716429762297} is an apocalyptic number.

998716429762297 is the 25803313-rd pentagonal number.

It is an amenable number.

998716429762297 is a deficient number, since it is larger than the sum of its proper divisors (64508283).

998716429762297 is a wasteful number, since it uses less digits than its factorization.

998716429762297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64508282.

The product of its digits is 20739898368, while the sum is 88.

The spelling of 998716429762297 in words is "nine hundred ninety-eight trillion, seven hundred sixteen billion, four hundred twenty-nine million, seven hundred sixty-two thousand, two hundred ninety-seven".