998188000939 has 4 divisors (see below), whose sum is σ = 998329735656. Its totient is φ = 998046266224.

The previous prime is 998188000921. The next prime is 998188000949. The reversal of 998188000939 is 939000881899.

998188000939 = T₈₁₅₇₅₅ + T₈₁₅₇₅₆ + T₈₁₅₇₅₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939000881899 = 31 ⋅30290351029.

It is a cyclic number.

It is not a de Polignac number, because 998188000939 - 2³¹ = 996040517291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998188000949) 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, 70856794 + ... + 70870879.

It is an arithmetic number, because the mean of its divisors is an integer number (249582433914).

Almost surely, 2^998188000939 is an apocalyptic number.

998188000939 is the 815757-th centered triangular number.

998188000939 is a deficient number, since it is larger than the sum of its proper divisors (141734717).

998188000939 is a wasteful number, since it uses less digits than its factorization.

998188000939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141734716.

The product of its (nonzero) digits is 10077696, while the sum is 64.

The spelling of 998188000939 in words is "nine hundred ninety-eight billion, one hundred eighty-eight million, nine hundred thirty-nine", and thus it is an aban number.