139318989 has 8 divisors (see below), whose sum is σ = 185849472. Its totient is φ = 92833920.

The previous prime is 139318979. The next prime is 139318997. The reversal of 139318989 is 989813931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139318989 - 2¹¹ = 139316941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139318979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3397 + ... + 17034.

It is an arithmetic number, because the mean of its divisors is an integer number (23231184).

Almost surely, 2^139318989 is an apocalyptic number.

It is an amenable number.

139318989 is a deficient number, since it is larger than the sum of its proper divisors (46530483).

139318989 is a wasteful number, since it uses less digits than its factorization.

139318989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22707.

The product of its digits is 419904, while the sum is 51.

The square root of 139318989 is about 11803.3465169841. The cubic root of 139318989 is about 518.4061018884.

The spelling of 139318989 in words is "one hundred thirty-nine million, three hundred eighteen thousand, nine hundred eighty-nine".