77321441 has 2 divisors, whose sum is σ = 77321442. Its totient is φ = 77321440.

The previous prime is 77321429. The next prime is 77321443. The reversal of 77321441 is 14412377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43507216 + 33814225 = 6596^2 + 5815^2 .

It is a cyclic number.

It is not a de Polignac number, because 77321441 - 2²⁶ = 10212577 is a prime.

Together with 77321443, 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 (77321443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38660720 + 38660721.

It is an arithmetic number, because the mean of its divisors is an integer number (38660721).

Almost surely, 2^77321441 is an apocalyptic number.

It is an amenable number.

77321441 is a deficient number, since it is larger than the sum of its proper divisors (1).

77321441 is an equidigital number, since it uses as much as digits as its factorization.

77321441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4704, while the sum is 29.

The square root of 77321441 is about 8793.2611129205. The cubic root of 77321441 is about 426.0232616773.

The spelling of 77321441 in words is "seventy-seven million, three hundred twenty-one thousand, four hundred forty-one".