47129081 has 2 divisors, whose sum is σ = 47129082. Its totient is φ = 47129080.

The previous prime is 47129041. The next prime is 47129087. The reversal of 47129081 is 18092174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35295481 + 11833600 = 5941^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 47129081 - 2¹⁴ = 47112697 is a prime.

It is a super-2 number, since 2×47129081² = 4442300551809122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47129087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23564540 + 23564541.

It is an arithmetic number, because the mean of its divisors is an integer number (23564541).

Almost surely, 2^47129081 is an apocalyptic number.

It is an amenable number.

47129081 is a deficient number, since it is larger than the sum of its proper divisors (1).

47129081 is an equidigital number, since it uses as much as digits as its factorization.

47129081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 47129081 is about 6865.0623449463. The cubic root of 47129081 is about 361.2126825355.

The spelling of 47129081 in words is "forty-seven million, one hundred twenty-nine thousand, eighty-one".