139082089 has 4 divisors (see below), whose sum is σ = 143568640. Its totient is φ = 134595540.

The previous prime is 139082077. The next prime is 139082129. The reversal of 139082089 is 980280931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139082089 - 2²¹ = 136984937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139082039) 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, 2243229 + ... + 2243290.

It is an arithmetic number, because the mean of its divisors is an integer number (35892160).

Almost surely, 2^139082089 is an apocalyptic number.

It is an amenable number.

139082089 is a deficient number, since it is larger than the sum of its proper divisors (4486551).

139082089 is an equidigital number, since it uses as much as digits as its factorization.

139082089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486550.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 139082089 is about 11793.3069577621. The cubic root of 139082089 is about 518.1121001356.

The spelling of 139082089 in words is "one hundred thirty-nine million, eighty-two thousand, eighty-nine".