139088663 has 4 divisors (see below), whose sum is σ = 158958480. Its totient is φ = 119218848.

The previous prime is 139088641. The next prime is 139088689. The reversal of 139088663 is 366880931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366880931 = 137 ⋅2677963.

It is not a de Polignac number, because 139088663 - 2¹⁰ = 139087639 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 (139088603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9934898 + ... + 9934911.

It is an arithmetic number, because the mean of its divisors is an integer number (39739620).

Almost surely, 2^139088663 is an apocalyptic number.

139088663 is a deficient number, since it is larger than the sum of its proper divisors (19869817).

139088663 is an equidigital number, since it uses as much as digits as its factorization.

139088663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19869816.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 139088663 is about 11793.5856718811. The cubic root of 139088663 is about 518.1202632171.

The spelling of 139088663 in words is "one hundred thirty-nine million, eighty-eight thousand, six hundred sixty-three".