47777321 has 2 divisors, whose sum is σ = 47777322. Its totient is φ = 47777320.

The previous prime is 47777311. The next prime is 47777339. The reversal of 47777321 is 12377774.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40960000 + 6817321 = 6400^2 + 2611^2 .

It is a cyclic number.

It is not a de Polignac number, because 47777321 - 2¹⁰ = 47776297 is a prime.

It is not a weakly prime, because it can be changed into another prime (47777311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23888660 + 23888661.

It is an arithmetic number, because the mean of its divisors is an integer number (23888661).

Almost surely, 2^47777321 is an apocalyptic number.

It is an amenable number.

47777321 is a deficient number, since it is larger than the sum of its proper divisors (1).

47777321 is an equidigital number, since it uses as much as digits as its factorization.

47777321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57624, while the sum is 38.

The square root of 47777321 is about 6912.1140760262. The cubic root of 47777321 is about 362.8612547695.

The spelling of 47777321 in words is "forty-seven million, seven hundred seventy-seven thousand, three hundred twenty-one".