47440817 has 2 divisors, whose sum is σ = 47440818. Its totient is φ = 47440816.

The previous prime is 47440801. The next prime is 47440837. The reversal of 47440817 is 71804474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30924721 + 16516096 = 5561^2 + 4064^2 .

It is a cyclic number.

It is not a de Polignac number, because 47440817 - 2⁴ = 47440801 is a prime.

It is a super-2 number, since 2×47440817² = 4501262235254978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47440837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23720408 + 23720409.

It is an arithmetic number, because the mean of its divisors is an integer number (23720409).

Almost surely, 2^47440817 is an apocalyptic number.

It is an amenable number.

47440817 is a deficient number, since it is larger than the sum of its proper divisors (1).

47440817 is an equidigital number, since it uses as much as digits as its factorization.

47440817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 47440817 is about 6887.7294517134. The cubic root of 47440817 is about 362.0073485276.

The spelling of 47440817 in words is "forty-seven million, four hundred forty thousand, eight hundred seventeen".