138677089 has 4 divisors (see below), whose sum is σ = 138705840. Its totient is φ = 138648340.

The previous prime is 138677087. The next prime is 138677093. The reversal of 138677089 is 980776831.

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 138677089 - 2¹ = 138677087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138677083) 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, 5179 + ... + 17440.

It is an arithmetic number, because the mean of its divisors is an integer number (34676460).

Almost surely, 2^138677089 is an apocalyptic number.

It is an amenable number.

138677089 is a deficient number, since it is larger than the sum of its proper divisors (28751).

138677089 is an equidigital number, since it uses as much as digits as its factorization.

138677089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28750.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 138677089 is about 11776.1236831141. The cubic root of 138677089 is about 517.6087057999.

The spelling of 138677089 in words is "one hundred thirty-eight million, six hundred seventy-seven thousand, eighty-nine".