139981337 has 8 divisors (see below), whose sum is σ = 145152000. Its totient is φ = 134851680.

The previous prime is 139981327. The next prime is 139981343. The reversal of 139981337 is 733189931.

139981337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139981337 - 2⁸ = 139981081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139981327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3212 + ... + 17037.

It is an arithmetic number, because the mean of its divisors is an integer number (18144000).

Almost surely, 2^139981337 is an apocalyptic number.

It is an amenable number.

139981337 is a deficient number, since it is larger than the sum of its proper divisors (5170663).

139981337 is a wasteful number, since it uses less digits than its factorization.

139981337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20503.

The product of its digits is 122472, while the sum is 44.

The square root of 139981337 is about 11831.3708842213. The cubic root of 139981337 is about 519.2263359413.

The spelling of 139981337 in words is "one hundred thirty-nine million, nine hundred eighty-one thousand, three hundred thirty-seven".