139723479 has 48 divisors (see below), whose sum is σ = 246405120. Its totient is φ = 74571840.

The previous prime is 139723477. The next prime is 139723481. The reversal of 139723479 is 974327931.

139723479 = 2108² + 2109² + ... + 2138².

It is an interprime number because it is at equal distance from previous prime (139723477) and next prime (139723481).

It is not a de Polignac number, because 139723479 - 2¹ = 139723477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139723477) 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 47 ways as a sum of consecutive naturals, for example, 55404 + ... + 57870.

It is an arithmetic number, because the mean of its divisors is an integer number (5133440).

Almost surely, 2^139723479 is an apocalyptic number.

139723479 is a deficient number, since it is larger than the sum of its proper divisors (106681641).

139723479 is a wasteful number, since it uses less digits than its factorization.

139723479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540 (or 2537 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 139723479 is about 11820.4686455318. The cubic root of 139723479 is about 518.9073197020.

The spelling of 139723479 in words is "one hundred thirty-nine million, seven hundred twenty-three thousand, four hundred seventy-nine".