139393442 has 8 divisors (see below), whose sum is σ = 209143296. Its totient is φ = 69679012.

The previous prime is 139393439. The next prime is 139393447. The reversal of 139393442 is 244393931.

It is a happy number.

139393442 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 junction number, because it is equal to n+sod(n) for n = 139393396 and 139393405.

It is not an unprimeable number, because it can be changed into a prime (139393447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5903 + ... + 17709.

It is an arithmetic number, because the mean of its divisors is an integer number (26142912).

Almost surely, 2^139393442 is an apocalyptic number.

It is a pronic number, being equal to 11806×11807.

139393442 is a deficient number, since it is larger than the sum of its proper divisors (69749854).

139393442 is a wasteful number, since it uses less digits than its factorization.

139393442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17712.

The product of its digits is 69984, while the sum is 38.

The square root of 139393442 is about 11806.4999894126. The cubic root of 139393442 is about 518.4984320063.

The spelling of 139393442 in words is "one hundred thirty-nine million, three hundred ninety-three thousand, four hundred forty-two".