139936489 has 16 divisors (see below), whose sum is σ = 176077440. Its totient is φ = 108034560.

The previous prime is 139936471. The next prime is 139936499. The reversal of 139936489 is 984639931.

It is a cyclic number.

It is not a de Polignac number, because 139936489 - 2⁵ = 139936457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139936499) 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 15 ways as a sum of consecutive naturals, for example, 57 + ... + 16729.

It is an arithmetic number, because the mean of its divisors is an integer number (11004840).

Almost surely, 2^139936489 is an apocalyptic number.

It is an amenable number.

139936489 is a deficient number, since it is larger than the sum of its proper divisors (36140951).

139936489 is a wasteful number, since it uses less digits than its factorization.

139936489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16800.

The product of its digits is 1259712, while the sum is 52.

The square root of 139936489 is about 11829.4754321567. The cubic root of 139936489 is about 519.1708791437.

The spelling of 139936489 in words is "one hundred thirty-nine million, nine hundred thirty-six thousand, four hundred eighty-nine".