998091411547 has 4 divisors (see below), whose sum is σ = 998093909160. Its totient is φ = 998088913936.

The previous prime is 998091411539. The next prime is 998091411599. The reversal of 998091411547 is 745114190899.

It is a semiprime because it is the product of two primes.

It is a 4-Lehmer number, since φ(998091411547) divides (998091411547-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 998091411547 - 2³ = 998091411539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 998091411491 and 998091411500.

It is not an unprimeable number, because it can be changed into a prime (998091411047) 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, 499522 + ... + 1498567.

It is an arithmetic number, because the mean of its divisors is an integer number (249523477290).

It is a Poulet number, since it divides 2^998091411546-1.

Almost surely, 2^998091411547 is an apocalyptic number.

998091411547 is the 499523-rd decagonal number.

998091411547 is a deficient number, since it is larger than the sum of its proper divisors (2497613).

998091411547 is a wasteful number, since it uses less digits than its factorization.

998091411547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497612.

The product of its (nonzero) digits is 3265920, while the sum is 58.

The spelling of 998091411547 in words is "nine hundred ninety-eight billion, ninety-one million, four hundred eleven thousand, five hundred forty-seven".