139198984 has 8 divisors (see below), whose sum is σ = 260998110. Its totient is φ = 69599488.

The previous prime is 139198981. The next prime is 139198993. The reversal of 139198984 is 489891931.

It can be written as a sum of positive squares in only one way, i.e., 108618084 + 30580900 = 10422^2 + 5530^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (139198981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8699929 + ... + 8699944.

Almost surely, 2^139198984 is an apocalyptic number.

It is an amenable number.

139198984 is a deficient number, since it is larger than the sum of its proper divisors (121799126).

139198984 is a wasteful number, since it uses less digits than its factorization.

139198984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17399879 (or 17399875 counting only the distinct ones).

The product of its digits is 559872, while the sum is 52.

The square root of 139198984 is about 11798.2619058911. The cubic root of 139198984 is about 518.2572128878.

The spelling of 139198984 in words is "one hundred thirty-nine million, one hundred ninety-eight thousand, nine hundred eighty-four".