139651389 has 24 divisors (see below), whose sum is σ = 204604920. Its totient is φ = 91779072.

The previous prime is 139651367. The next prime is 139651397. The reversal of 139651389 is 983156931.

139651389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1988100 + 137663289 = 1410^2 + 11733^2 .

It is not a de Polignac number, because 139651389 - 2⁷ = 139651261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139651319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358807 + ... + 359195.

It is an arithmetic number, because the mean of its divisors is an integer number (8525205).

Almost surely, 2^139651389 is an apocalyptic number.

It is an amenable number.

139651389 is a deficient number, since it is larger than the sum of its proper divisors (64953531).

139651389 is a wasteful number, since it uses less digits than its factorization.

139651389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 858 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 139651389 is about 11817.4188806186. The cubic root of 139651389 is about 518.8180613461.

The spelling of 139651389 in words is "one hundred thirty-nine million, six hundred fifty-one thousand, three hundred eighty-nine".