139285479 has 4 divisors (see below), whose sum is σ = 185713976. Its totient is φ = 92856984.

The previous prime is 139285477. The next prime is 139285483. The reversal of 139285479 is 974582931.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 139285479 - 2¹ = 139285477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139285477) 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, 23214244 + ... + 23214249.

It is an arithmetic number, because the mean of its divisors is an integer number (46428494).

Almost surely, 2^139285479 is an apocalyptic number.

139285479 is a deficient number, since it is larger than the sum of its proper divisors (46428497).

139285479 is an equidigital number, since it uses as much as digits as its factorization.

139285479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46428496.

The product of its digits is 544320, while the sum is 48.

The square root of 139285479 is about 11801.9269189400. The cubic root of 139285479 is about 518.3645349740.

The spelling of 139285479 in words is "one hundred thirty-nine million, two hundred eighty-five thousand, four hundred seventy-nine".