139940165 has 8 divisors (see below), whose sum is σ = 175229568. Its totient is φ = 107084560.

The previous prime is 139940159. The next prime is 139940191. The reversal of 139940165 is 561049931.

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

It is not a de Polignac number, because 139940165 - 2¹⁶ = 139874629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608321 + ... + 608550.

It is an arithmetic number, because the mean of its divisors is an integer number (21903696).

Almost surely, 2^139940165 is an apocalyptic number.

It is an amenable number.

139940165 is a deficient number, since it is larger than the sum of its proper divisors (35289403).

139940165 is a wasteful number, since it uses less digits than its factorization.

139940165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216899.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 139940165 is about 11829.6308057352. The cubic root of 139940165 is about 519.1754251476.

The spelling of 139940165 in words is "one hundred thirty-nine million, nine hundred forty thousand, one hundred sixty-five".