139689000 has 384 divisors, whose sum is σ = 551940480. Its totient is φ = 31488000.

The previous prime is 139688999. The next prime is 139689001. The reversal of 139689000 is 986931.

139689000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (139688999) and next prime (139689001).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139689001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1682959 + ... + 1683041.

It is an arithmetic number, because the mean of its divisors is an integer number (1437345).

Almost surely, 2^139689000 is an apocalyptic number.

139689000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139689000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275970240).

139689000 is an abundant number, since it is smaller than the sum of its proper divisors (412251480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139689000 is a wasteful number, since it uses less digits than its factorization.

139689000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 139689000 is about 11819.0101108342. The cubic root of 139689000 is about 518.8646333010.

The spelling of 139689000 in words is "one hundred thirty-nine million, six hundred eighty-nine thousand".