998408007 has 6 divisors (see below), whose sum is σ = 1442144912. Its totient is φ = 665605332.

The previous prime is 998407999. The next prime is 998408009. The reversal of 998408007 is 700804899.

It is not a de Polignac number, because 998408007 - 2³ = 998407999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998408009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55467103 + ... + 55467120.

Almost surely, 2^998408007 is an apocalyptic number.

998408007 is a deficient number, since it is larger than the sum of its proper divisors (443736905).

998408007 is a wasteful number, since it uses less digits than its factorization.

998408007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110934229 (or 110934226 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 998408007 is about 31597.5949559456. The cubic root of 998408007 is about 999.4690538127.

The spelling of 998408007 in words is "nine hundred ninety-eight million, four hundred eight thousand, seven".