139938459 has 8 divisors (see below), whose sum is σ = 186645312. Its totient is φ = 93261960.

The previous prime is 139938443. The next prime is 139938479. The reversal of 139938459 is 954839931.

It is a happy number.

139938459 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 not a de Polignac number, because 139938459 - 2⁴ = 139938443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139938419) 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, 7404 + ... + 18294.

It is an arithmetic number, because the mean of its divisors is an integer number (23330664).

Almost surely, 2^139938459 is an apocalyptic number.

139938459 is a deficient number, since it is larger than the sum of its proper divisors (46706853).

139938459 is a wasteful number, since it uses less digits than its factorization.

139938459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15177.

The product of its digits is 1049760, while the sum is 51.

The square root of 139938459 is about 11829.5586984469. The cubic root of 139938459 is about 519.1733153962.

The spelling of 139938459 in words is "one hundred thirty-nine million, nine hundred thirty-eight thousand, four hundred fifty-nine".