71477321 has 2 divisors, whose sum is σ = 71477322. Its totient is φ = 71477320.

The previous prime is 71477281. The next prime is 71477323. The reversal of 71477321 is 12377417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62980096 + 8497225 = 7936^2 + 2915^2 .

It is a cyclic number.

It is not a de Polignac number, because 71477321 - 2²² = 67283017 is a prime.

Together with 71477323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71477323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35738660 + 35738661.

It is an arithmetic number, because the mean of its divisors is an integer number (35738661).

Almost surely, 2^71477321 is an apocalyptic number.

It is an amenable number.

71477321 is a deficient number, since it is larger than the sum of its proper divisors (1).

71477321 is an equidigital number, since it uses as much as digits as its factorization.

71477321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8232, while the sum is 32.

The square root of 71477321 is about 8454.4261189036. The cubic root of 71477321 is about 415.0076371556.

The spelling of 71477321 in words is "seventy-one million, four hundred seventy-seven thousand, three hundred twenty-one".