139461439 has 8 divisors (see below), whose sum is σ = 150342192. Its totient is φ = 128602560.

The previous prime is 139461437. The next prime is 139461457. The reversal of 139461439 is 934164931.

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

It is a cyclic number.

It is not a de Polignac number, because 139461439 - 2¹ = 139461437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139461437) 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, 9267 + ... + 19099.

It is an arithmetic number, because the mean of its divisors is an integer number (18792774).

Almost surely, 2^139461439 is an apocalyptic number.

139461439 is a deficient number, since it is larger than the sum of its proper divisors (10880753).

139461439 is a wasteful number, since it uses less digits than its factorization.

139461439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10937.

The product of its digits is 69984, while the sum is 40.

The square root of 139461439 is about 11809.3792808936. The cubic root of 139461439 is about 518.5827272362.

The spelling of 139461439 in words is "one hundred thirty-nine million, four hundred sixty-one thousand, four hundred thirty-nine".