139198139 has 8 divisors (see below), whose sum is σ = 145821600. Its totient is φ = 132622336.

The previous prime is 139198121. The next prime is 139198151. The reversal of 139198139 is 931891931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139198139 - 2¹² = 139194043 is a prime.

It is a super-2 number, since 2×139198139² = 38752243802126642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139198139.

It is not an unprimeable number, because it can be changed into a prime (139198109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5864 + ... + 17685.

It is an arithmetic number, because the mean of its divisors is an integer number (18227700).

Almost surely, 2^139198139 is an apocalyptic number.

139198139 is a deficient number, since it is larger than the sum of its proper divisors (6623461).

139198139 is a wasteful number, since it uses less digits than its factorization.

139198139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23829.

The product of its digits is 52488, while the sum is 44.

The square root of 139198139 is about 11798.2260954772. The cubic root of 139198139 is about 518.2561642014.

The spelling of 139198139 in words is "one hundred thirty-nine million, one hundred ninety-eight thousand, one hundred thirty-nine".