139139139 has 8 divisors (see below), whose sum is σ = 186854080. Its totient is φ = 92091816.

The previous prime is 139139137. The next prime is 139139141. The reversal of 139139139 is 931931931.

It is an interprime number because it is at equal distance from previous prime (139139137) and next prime (139139141).

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

It is not a de Polignac number, because 139139139 - 2¹ = 139139137 is a prime.

It is a super-2 number, since 2×139139139² = 38719400003322642, which contains 22 as substring.

It is a Duffinian number.

139139139 is a modest number, since divided by 139139 gives 139 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 139139097 and 139139106.

It is not an unprimeable number, because it can be changed into a prime (139139131) 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, 166417 + ... + 167250.

It is an arithmetic number, because the mean of its divisors is an integer number (23356760).

Almost surely, 2^139139139 is an apocalyptic number.

139139139 is a deficient number, since it is larger than the sum of its proper divisors (47714941).

139139139 is a wasteful number, since it uses less digits than its factorization.

139139139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333809.

The product of its digits is 19683, while the sum is 39.

The square root of 139139139 is about 11795.7254545874. The cubic root of 139139139 is about 518.1829318172.

The spelling of 139139139 in words is "one hundred thirty-nine million, one hundred thirty-nine thousand, one hundred thirty-nine".