47638961 has 2 divisors, whose sum is σ = 47638962. Its totient is φ = 47638960.

The previous prime is 47638939. The next prime is 47638979. The reversal of 47638961 is 16983674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 12117361 = 5960^2 + 3481^2 .

It is a cyclic number.

It is not a de Polignac number, because 47638961 - 2⁶ = 47638897 is a prime.

It is a Chen prime.

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

It is not a weakly prime, because it can be changed into another prime (47638991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23819480 + 23819481.

It is an arithmetic number, because the mean of its divisors is an integer number (23819481).

Almost surely, 2^47638961 is an apocalyptic number.

It is an amenable number.

47638961 is a deficient number, since it is larger than the sum of its proper divisors (1).

47638961 is an equidigital number, since it uses as much as digits as its factorization.

47638961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 47638961 is about 6902.0983041391. The cubic root of 47638961 is about 362.5106419389.

The spelling of 47638961 in words is "forty-seven million, six hundred thirty-eight thousand, nine hundred sixty-one".