47668081 has 4 divisors (see below), whose sum is σ = 47726964. Its totient is φ = 47609200.

The previous prime is 47668079. The next prime is 47668139. The reversal of 47668081 is 18086674.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11560000 + 36108081 = 3400^2 + 6009^2 .

It is a cyclic number.

It is not a de Polignac number, because 47668081 - 2¹ = 47668079 is a prime.

It is a super-2 number, since 2×47668081² = 4544491892445122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47665081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28210 + ... + 29851.

It is an arithmetic number, because the mean of its divisors is an integer number (11931741).

Almost surely, 2^47668081 is an apocalyptic number.

It is an amenable number.

47668081 is a deficient number, since it is larger than the sum of its proper divisors (58883).

47668081 is an equidigital number, since it uses as much as digits as its factorization.

47668081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58882.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 47668081 is about 6904.2074852947. The cubic root of 47668081 is about 362.5844901750.

The spelling of 47668081 in words is "forty-seven million, six hundred sixty-eight thousand, eighty-one".