139609316 has 72 divisors (see below), whose sum is σ = 311028480. Its totient is φ = 53665920.

The previous prime is 139609303. The next prime is 139609319. The reversal of 139609316 is 613906931.

It is a super-2 number, since 2×139609316² = 38981522227975712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139609316.

It is not an unprimeable number, because it can be changed into a prime (139609319) 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, 301301 + ... + 301763.

It is an arithmetic number, because the mean of its divisors is an integer number (4319840).

Almost surely, 2^139609316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139609316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155514240).

139609316 is an abundant number, since it is smaller than the sum of its proper divisors (171419164).

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

139609316 is a wasteful number, since it uses less digits than its factorization.

139609316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 139609316 is about 11815.6386200662. The cubic root of 139609316 is about 518.7659543939.

The spelling of 139609316 in words is "one hundred thirty-nine million, six hundred nine thousand, three hundred sixteen".