139076081 has 8 divisors (see below), whose sum is σ = 145531944. Its totient is φ = 132762240.

The previous prime is 139076053. The next prime is 139076089. The reversal of 139076081 is 180670931.

It can be written as a sum of positive squares in 4 ways, for example, as 97911025 + 41165056 = 9895^2 + 6416^2 .

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 139076081 - 2⁶ = 139076017 is a prime.

It is a super-2 number, since 2×139076081² = 38684312612637122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139076089) 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 7 ways as a sum of consecutive naturals, for example, 33500 + ... + 37421.

It is an arithmetic number, because the mean of its divisors is an integer number (18191493).

Almost surely, 2^139076081 is an apocalyptic number.

It is an amenable number.

139076081 is a deficient number, since it is larger than the sum of its proper divisors (6455863).

139076081 is an equidigital number, since it uses as much as digits as its factorization.

139076081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71011.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 139076081 is about 11793.0522342606. The cubic root of 139076081 is about 518.1046396439.

The spelling of 139076081 in words is "one hundred thirty-nine million, seventy-six thousand, eighty-one".