139740389 has 8 divisors (see below), whose sum is σ = 141164640. Its totient is φ = 138323376.

The previous prime is 139740361. The next prime is 139740397. The reversal of 139740389 is 983047931.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139740389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139740319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42254 + ... + 45440.

It is an arithmetic number, because the mean of its divisors is an integer number (17645580).

Almost surely, 2^139740389 is an apocalyptic number.

It is an amenable number.

139740389 is a deficient number, since it is larger than the sum of its proper divisors (1424251).

139740389 is a wasteful number, since it uses less digits than its factorization.

139740389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3619.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 139740389 is about 11821.1839085601. The cubic root of 139740389 is about 518.9282524015.

The spelling of 139740389 in words is "one hundred thirty-nine million, seven hundred forty thousand, three hundred eighty-nine".