139217852 has 24 divisors (see below), whose sum is σ = 247632000. Its totient is φ = 68475456.

The previous prime is 139217839. The next prime is 139217861. The reversal of 139217852 is 258712931.

It is a super-2 number, since 2×139217852² = 38763220630987808, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63893 + ... + 66035.

It is an arithmetic number, because the mean of its divisors is an integer number (10318000).

Almost surely, 2^139217852 is an apocalyptic number.

It is an amenable number.

139217852 is a deficient number, since it is larger than the sum of its proper divisors (108414148).

139217852 is a wasteful number, since it uses less digits than its factorization.

139217852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405 (or 2403 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 139217852 is about 11799.0614881015. The cubic root of 139217852 is about 518.2806278942.

The spelling of 139217852 in words is "one hundred thirty-nine million, two hundred seventeen thousand, eight hundred fifty-two".