139008947 has 16 divisors (see below), whose sum is σ = 174645504. Its totient is φ = 107484000.

The previous prime is 139008931. The next prime is 139008967. The reversal of 139008947 is 749800931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 139008947 - 2⁴ = 139008931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139008907) 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, 3197 + ... + 16977.

It is an arithmetic number, because the mean of its divisors is an integer number (10915344).

Almost surely, 2^139008947 is an apocalyptic number.

139008947 is a deficient number, since it is larger than the sum of its proper divisors (35636557).

139008947 is a wasteful number, since it uses less digits than its factorization.

139008947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13930.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 139008947 is about 11790.2055537637. The cubic root of 139008947 is about 518.0212607365.

The spelling of 139008947 in words is "one hundred thirty-nine million, eight thousand, nine hundred forty-seven".