47917081 has 2 divisors, whose sum is σ = 47917082. Its totient is φ = 47917080.

The previous prime is 47917063. The next prime is 47917087. The reversal of 47917081 is 18071974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47817225 + 99856 = 6915^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 47917081 - 2⁹ = 47916569 is a prime.

It is a super-2 number, since 2×47917081² = 4592093303121122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47917081.

It is not a weakly prime, because it can be changed into another prime (47917087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23958540 + 23958541.

It is an arithmetic number, because the mean of its divisors is an integer number (23958541).

Almost surely, 2^47917081 is an apocalyptic number.

It is an amenable number.

47917081 is a deficient number, since it is larger than the sum of its proper divisors (1).

47917081 is an equidigital number, since it uses as much as digits as its factorization.

47917081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 47917081 is about 6922.2164802901. The cubic root of 47917081 is about 363.2147287501.

The spelling of 47917081 in words is "forty-seven million, nine hundred seventeen thousand, eighty-one".