139235912 has 8 divisors (see below), whose sum is σ = 261067350. Its totient is φ = 69617952.

The previous prime is 139235897. The next prime is 139235939. The reversal of 139235912 is 219532931.

It can be written as a sum of positive squares in only one way, i.e., 117202276 + 22033636 = 10826^2 + 4694^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8702237 + ... + 8702252.

Almost surely, 2^139235912 is an apocalyptic number.

It is an amenable number.

139235912 is a deficient number, since it is larger than the sum of its proper divisors (121831438).

139235912 is a wasteful number, since it uses less digits than its factorization.

139235912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17404495 (or 17404491 counting only the distinct ones).

The product of its digits is 14580, while the sum is 35.

The square root of 139235912 is about 11799.8267783896. The cubic root of 139235912 is about 518.3030381989.

The spelling of 139235912 in words is "one hundred thirty-nine million, two hundred thirty-five thousand, nine hundred twelve".