139499136 has 96 divisors (see below), whose sum is σ = 458796000. Its totient is φ = 39854592.

The previous prime is 139499119. The next prime is 139499137. The reversal of 139499136 is 631994931.

It is a tau number, because it is divible by the number of its divisors (96).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 139499091 and 139499100.

It is not an unprimeable number, because it can be changed into a prime (139499137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 586 + ... + 16713.

It is an arithmetic number, because the mean of its divisors is an integer number (4779125).

Almost surely, 2^139499136 is an apocalyptic number.

139499136 is a gapful number since it is divisible by the number (16) 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 139499136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229398000).

139499136 is an abundant number, since it is smaller than the sum of its proper divisors (319296864).

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

139499136 is a wasteful number, since it uses less digits than its factorization.

139499136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17326 (or 17311 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 139499136 is about 11810.9752349245. The cubic root of 139499136 is about 518.6294480408.

The spelling of 139499136 in words is "one hundred thirty-nine million, four hundred ninety-nine thousand, one hundred thirty-six".