139609768 has 16 divisors (see below), whose sum is σ = 263504160. Its totient is φ = 69342000.

The previous prime is 139609759. The next prime is 139609783. The reversal of 139609768 is 867906931.

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, 56578 + ... + 58993.

It is an arithmetic number, because the mean of its divisors is an integer number (16469010).

Almost surely, 2^139609768 is an apocalyptic number.

It is an amenable number.

139609768 is a deficient number, since it is larger than the sum of its proper divisors (123894392).

139609768 is a wasteful number, since it uses less digits than its factorization.

139609768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115728 (or 115724 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 139609768 is about 11815.6577472437. The cubic root of 139609768 is about 518.7665142466.

The spelling of 139609768 in words is "one hundred thirty-nine million, six hundred nine thousand, seven hundred sixty-eight".