47670581 has 6 divisors (see below), whose sum is σ = 55453590. Its totient is φ = 40860456.

The previous prime is 47670547. The next prime is 47670587. The reversal of 47670581 is 18507674.

It can be written as a sum of positive squares in only one way, i.e., 43112356 + 4558225 = 6566^2 + 2135^2 .

It is not a de Polignac number, because 47670581 - 2⁶ = 47670517 is a prime.

It is a super-2 number, since 2×47670581² = 4544968585755122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47670587) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 486386 + ... + 486483.

It is an arithmetic number, because the mean of its divisors is an integer number (9242265).

Almost surely, 2^47670581 is an apocalyptic number.

It is an amenable number.

47670581 is a deficient number, since it is larger than the sum of its proper divisors (7783009).

47670581 is an equidigital number, since it uses as much as digits as its factorization.

47670581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972883 (or 972876 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 47670581 is about 6904.3885319411. The cubic root of 47670581 is about 362.5908287658.

The spelling of 47670581 in words is "forty-seven million, six hundred seventy thousand, five hundred eighty-one".