139309718 has 16 divisors (see below), whose sum is σ = 214885440. Its totient is φ = 67694400.

The previous prime is 139309717. The next prime is 139309741. The reversal of 139309718 is 817903931.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139309717) by changing a digit.

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, 19088 + ... + 25356.

It is an arithmetic number, because the mean of its divisors is an integer number (13430340).

Almost surely, 2^139309718 is an apocalyptic number.

139309718 is a deficient number, since it is larger than the sum of its proper divisors (75575722).

139309718 is a wasteful number, since it uses less digits than its factorization.

139309718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6583.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 139309718 is about 11802.9537828461. The cubic root of 139309718 is about 518.3946024998.

The spelling of 139309718 in words is "one hundred thirty-nine million, three hundred nine thousand, seven hundred eighteen".