139797306 has 32 divisors (see below), whose sum is σ = 338904000. Its totient is φ = 42362640.

The previous prime is 139797283. The next prime is 139797323. The reversal of 139797306 is 603797931.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117081 + ... + 118268.

It is an arithmetic number, because the mean of its divisors is an integer number (10590750).

Almost surely, 2^139797306 is an apocalyptic number.

139797306 is an abundant number, since it is smaller than the sum of its proper divisors (199106694).

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

139797306 is a wasteful number, since it uses less digits than its factorization.

139797306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235371 (or 235365 counting only the distinct ones).

The product of its (nonzero) digits is 214326, while the sum is 45.

The square root of 139797306 is about 11823.5910788559. The cubic root of 139797306 is about 518.9986969128.

The spelling of 139797306 in words is "one hundred thirty-nine million, seven hundred ninety-seven thousand, three hundred six".