139008663 has 16 divisors (see below), whose sum is σ = 208065760. Its totient is φ = 91715328.

The previous prime is 139008659. The next prime is 139008689. The reversal of 139008663 is 366800931.

It is a happy number.

It is not a de Polignac number, because 139008663 - 2² = 139008659 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 (139008263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23920 + ... + 29157.

It is an arithmetic number, because the mean of its divisors is an integer number (13004110).

Almost surely, 2^139008663 is an apocalyptic number.

139008663 is a deficient number, since it is larger than the sum of its proper divisors (69057097).

139008663 is an equidigital number, since it uses as much as digits as its factorization.

139008663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53183 (or 53177 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 139008663 is about 11790.1935098623. The cubic root of 139008663 is about 518.0209079579.

The spelling of 139008663 in words is "one hundred thirty-nine million, eight thousand, six hundred sixty-three".