998136939 has 8 divisors (see below), whose sum is σ = 1332249552. Its totient is φ = 664724480.

The previous prime is 998136917. The next prime is 998136943. The reversal of 998136939 is 939631899.

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 998136939 - 2⁹ = 998136427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998136539) 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, 171702 + ... + 177419.

It is an arithmetic number, because the mean of its divisors is an integer number (166531194).

Almost surely, 2^998136939 is an apocalyptic number.

998136939 is a deficient number, since it is larger than the sum of its proper divisors (334112613).

998136939 is a wasteful number, since it uses less digits than its factorization.

998136939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350077.

The product of its digits is 2834352, while the sum is 57.

The square root of 998136939 is about 31593.3052876713. The cubic root of 998136939 is about 999.3785936007.

The spelling of 998136939 in words is "nine hundred ninety-eight million, one hundred thirty-six thousand, nine hundred thirty-nine".