139738989 has 32 divisors (see below), whose sum is σ = 205148160. Its totient is φ = 84091392.

The previous prime is 139738987. The next prime is 139738993. The reversal of 139738989 is 989837931.

It is not a de Polignac number, because 139738989 - 2¹ = 139738987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139738987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 440659 + ... + 440975.

It is an arithmetic number, because the mean of its divisors is an integer number (6410880).

Almost surely, 2^139738989 is an apocalyptic number.

It is an amenable number.

139738989 is a deficient number, since it is larger than the sum of its proper divisors (65409171).

139738989 is a wasteful number, since it uses less digits than its factorization.

139738989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its digits is 2939328, while the sum is 57.

The square root of 139738989 is about 11821.1246926847. The cubic root of 139738989 is about 518.9265194213.

The spelling of 139738989 in words is "one hundred thirty-nine million, seven hundred thirty-eight thousand, nine hundred eighty-nine".