180139091 has 8 divisors (see below), whose sum is σ = 196613568. Its totient is φ = 163681000.

The previous prime is 180139087. The next prime is 180139121. The reversal of 180139091 is 190931081.

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 180139091 - 2² = 180139087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180139031) 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, 36056 + ... + 40746.

It is an arithmetic number, because the mean of its divisors is an integer number (24576696).

Almost surely, 2^180139091 is an apocalyptic number.

180139091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

180139091 is a deficient number, since it is larger than the sum of its proper divisors (16474477).

180139091 is a wasteful number, since it uses less digits than its factorization.

180139091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8193.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 180139091 is about 13421.5904795222. The cubic root of 180139091 is about 564.7670128205.

The spelling of 180139091 in words is "one hundred eighty million, one hundred thirty-nine thousand, ninety-one".