139378587 has 16 divisors (see below), whose sum is σ = 187857408. Its totient is φ = 91915200.

The previous prime is 139378541. The next prime is 139378601. The reversal of 139378587 is 785873931.

It is not a de Polignac number, because 139378587 - 2¹⁶ = 139313051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139378517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141298 + ... + 142280.

It is an arithmetic number, because the mean of its divisors is an integer number (11741088).

Almost surely, 2^139378587 is an apocalyptic number.

139378587 is a deficient number, since it is larger than the sum of its proper divisors (48478821).

139378587 is a wasteful number, since it uses less digits than its factorization.

139378587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450.

The product of its digits is 1270080, while the sum is 51.

The square root of 139378587 is about 11805.8708700375. The cubic root of 139378587 is about 518.4800127567.

The spelling of 139378587 in words is "one hundred thirty-nine million, three hundred seventy-eight thousand, five hundred eighty-seven".