139216591 has 8 divisors (see below), whose sum is σ = 146795120. Its totient is φ = 131663232.

The previous prime is 139216547. The next prime is 139216613. The reversal of 139216591 is 195612931.

It is a happy number.

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 139216591 - 2⁷ = 139216463 is a prime.

It is a super-2 number, since 2×139216591² = 38762518419322562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139216591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139216291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5671 + ... + 17623.

It is an arithmetic number, because the mean of its divisors is an integer number (18349390).

Almost surely, 2^139216591 is an apocalyptic number.

139216591 is a deficient number, since it is larger than the sum of its proper divisors (7578529).

139216591 is a wasteful number, since it uses less digits than its factorization.

139216591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12585.

The product of its digits is 14580, while the sum is 37.

The square root of 139216591 is about 11799.0080515270. The cubic root of 139216591 is about 518.2790630713.

The spelling of 139216591 in words is "one hundred thirty-nine million, two hundred sixteen thousand, five hundred ninety-one".