139608212 has 6 divisors (see below), whose sum is σ = 244314378. Its totient is φ = 69804104.

The previous prime is 139608191. The next prime is 139608253. The reversal of 139608212 is 212806931.

It can be written as a sum of positive squares in only one way, i.e., 139381636 + 226576 = 11806^2 + 476^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17451023 + ... + 17451030.

It is an arithmetic number, because the mean of its divisors is an integer number (40719063).

Almost surely, 2^139608212 is an apocalyptic number.

It is an amenable number.

139608212 is a deficient number, since it is larger than the sum of its proper divisors (104706166).

139608212 is a wasteful number, since it uses less digits than its factorization.

139608212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34902057 (or 34902055 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 139608212 is about 11815.5919022282. The cubic root of 139608212 is about 518.7645869610.

The spelling of 139608212 in words is "one hundred thirty-nine million, six hundred eight thousand, two hundred twelve".