139939615 has 8 divisors (see below), whose sum is σ = 168053328. Its totient is φ = 111867840.

The previous prime is 139939603. The next prime is 139939627. The reversal of 139939615 is 516939931.

It is an interprime number because it is at equal distance from previous prime (139939603) and next prime (139939627).

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

It is not a de Polignac number, because 139939615 - 2¹³ = 139931423 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, 2601 + ... + 16930.

It is an arithmetic number, because the mean of its divisors is an integer number (21006666).

Almost surely, 2^139939615 is an apocalyptic number.

139939615 is a deficient number, since it is larger than the sum of its proper divisors (28113713).

139939615 is a wasteful number, since it uses less digits than its factorization.

139939615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20969.

The product of its digits is 196830, while the sum is 46.

The square root of 139939615 is about 11829.6075590021. The cubic root of 139939615 is about 519.1747449834.

It can be divided in two parts, 1399 and 39615, that added together give a palindrome (41014).

The spelling of 139939615 in words is "one hundred thirty-nine million, nine hundred thirty-nine thousand, six hundred fifteen".