139209036 has 12 divisors (see below), whose sum is σ = 324821112. Its totient is φ = 46403008.

The previous prime is 139208989. The next prime is 139209043. The reversal of 139209036 is 630902931.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 139208988 and 139209006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5800365 + ... + 5800388.

It is an arithmetic number, because the mean of its divisors is an integer number (27068426).

Almost surely, 2^139209036 is an apocalyptic number.

It is an amenable number.

139209036 is an abundant number, since it is smaller than the sum of its proper divisors (185612076).

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

139209036 is a wasteful number, since it uses less digits than its factorization.

139209036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11600760 (or 11600758 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 139209036 is about 11798.6878931515. The cubic root of 139209036 is about 518.2696875864.

The spelling of 139209036 in words is "one hundred thirty-nine million, two hundred nine thousand, thirty-six".