139581368 has 16 divisors (see below), whose sum is σ = 265622280. Its totient is φ = 68748768.

The previous prime is 139581347. The next prime is 139581371. The reversal of 139581368 is 863185931.

139581368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 129671 + ... + 130742.

Almost surely, 2^139581368 is an apocalyptic number.

It is an amenable number.

139581368 is a deficient number, since it is larger than the sum of its proper divisors (126040912).

139581368 is a wasteful number, since it uses less digits than its factorization.

139581368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260486 (or 260482 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 139581368 is about 11814.4558909837. The cubic root of 139581368 is about 518.7313353134.

The spelling of 139581368 in words is "one hundred thirty-nine million, five hundred eighty-one thousand, three hundred sixty-eight".