998135417 has 4 divisors (see below), whose sum is σ = 1050668880. Its totient is φ = 945601956.

The previous prime is 998135407. The next prime is 998135443. The reversal of 998135417 is 714531899.

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 not a de Polignac number, because 998135417 - 2⁴ = 998135401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998135407) 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, 26266703 + ... + 26266740.

It is an arithmetic number, because the mean of its divisors is an integer number (262667220).

Almost surely, 2^998135417 is an apocalyptic number.

It is an amenable number.

998135417 is a deficient number, since it is larger than the sum of its proper divisors (52533463).

998135417 is a wasteful number, since it uses less digits than its factorization.

998135417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52533462.

The product of its digits is 272160, while the sum is 47.

The square root of 998135417 is about 31593.2812002805. The cubic root of 998135417 is about 999.3780856360.

The spelling of 998135417 in words is "nine hundred ninety-eight million, one hundred thirty-five thousand, four hundred seventeen".