139389508 has 24 divisors (see below), whose sum is σ = 251887104. Its totient is φ = 67442400.

The previous prime is 139389487. The next prime is 139389541. The reversal of 139389508 is 805983931.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25803 + ... + 30733.

It is an arithmetic number, because the mean of its divisors is an integer number (10495296).

Almost surely, 2^139389508 is an apocalyptic number.

It is an amenable number.

139389508 is a deficient number, since it is larger than the sum of its proper divisors (112497596).

139389508 is a wasteful number, since it uses less digits than its factorization.

139389508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163 (or 5161 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 139389508 is about 11806.3333850946. Note that the first 4 decimals coincide. The cubic root of 139389508 is about 518.4935542254.

The spelling of 139389508 in words is "one hundred thirty-nine million, three hundred eighty-nine thousand, five hundred eight".