47666731 has 4 divisors (see below), whose sum is σ = 54476272. Its totient is φ = 40857192.

The previous prime is 47666719. The next prime is 47666753. The reversal of 47666731 is 13766674.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13766674 = 2 ⋅6883337.

It is a cyclic number.

It is not a de Polignac number, because 47666731 - 2⁵ = 47666699 is a prime.

It is a super-2 number, since 2×47666731² = 4544234488452722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47666761) 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, 3404760 + ... + 3404773.

It is an arithmetic number, because the mean of its divisors is an integer number (13619068).

Almost surely, 2^47666731 is an apocalyptic number.

47666731 is a deficient number, since it is larger than the sum of its proper divisors (6809541).

47666731 is an equidigital number, since it uses as much as digits as its factorization.

47666731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809540.

The product of its digits is 127008, while the sum is 40.

The square root of 47666731 is about 6904.1097181317. The cubic root of 47666731 is about 362.5810672438.

It can be divided in two parts, 4766673 and 1, that added together give a palindrome (4766674).

The spelling of 47666731 in words is "forty-seven million, six hundred sixty-six thousand, seven hundred thirty-one".