139081893 has 8 divisors (see below), whose sum is σ = 185920800. Its totient is φ = 92482128.

The previous prime is 139081889. The next prime is 139081907. The reversal of 139081893 is 398180931.

It is a happy number.

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

It is not a de Polignac number, because 139081893 - 2² = 139081889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139081093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58423 + ... + 60756.

It is an arithmetic number, because the mean of its divisors is an integer number (23240100).

Almost surely, 2^139081893 is an apocalyptic number.

It is an amenable number.

139081893 is a deficient number, since it is larger than the sum of its proper divisors (46838907).

139081893 is a wasteful number, since it uses less digits than its factorization.

139081893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119571.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 139081893 is about 11793.2986479611. The cubic root of 139081893 is about 518.1118567541. Note that the first 3 decimals are identical.

The spelling of 139081893 in words is "one hundred thirty-nine million, eighty-one thousand, eight hundred ninety-three".