139384591 has 8 divisors (see below), whose sum is σ = 141218640. Its totient is φ = 137556672.

The previous prime is 139384579. The next prime is 139384601. The reversal of 139384591 is 195483931.

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

It is a cyclic number.

It is not a de Polignac number, because 139384591 - 2⁵ = 139384559 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 (139384391) 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, 59641 + ... + 61933.

It is an arithmetic number, because the mean of its divisors is an integer number (17652330).

Almost surely, 2^139384591 is an apocalyptic number.

139384591 is a deficient number, since it is larger than the sum of its proper divisors (1834049).

139384591 is an equidigital number, since it uses as much as digits as its factorization.

139384591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065.

The product of its digits is 116640, while the sum is 43.

The square root of 139384591 is about 11806.1251475664. The cubic root of 139384591 is about 518.4874574902.

The spelling of 139384591 in words is "one hundred thirty-nine million, three hundred eighty-four thousand, five hundred ninety-one".