139533487 has 8 divisors (see below), whose sum is σ = 140532336. Its totient is φ = 138538752.

The previous prime is 139533481. The next prime is 139533491. The reversal of 139533487 is 784335931.

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 not a de Polignac number, because 139533487 - 2¹¹ = 139531439 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 (139533481) 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, 97068 + ... + 98494.

It is an arithmetic number, because the mean of its divisors is an integer number (17566542).

Almost surely, 2^139533487 is an apocalyptic number.

139533487 is a deficient number, since it is larger than the sum of its proper divisors (998849).

139533487 is a wasteful number, since it uses less digits than its factorization.

139533487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057.

The product of its digits is 272160, while the sum is 43.

The square root of 139533487 is about 11812.4293437040. The cubic root of 139533487 is about 518.6720145602.

The spelling of 139533487 in words is "one hundred thirty-nine million, five hundred thirty-three thousand, four hundred eighty-seven".