77322449 has 2 divisors, whose sum is σ = 77322450. Its totient is φ = 77322448.

The previous prime is 77322431. The next prime is 77322461. The reversal of 77322449 is 94422377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55606849 + 21715600 = 7457^2 + 4660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77322449 is a prime.

It is a super-2 number, since 2×77322449² = 11957522238715202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77312449) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38661224 + 38661225.

It is an arithmetic number, because the mean of its divisors is an integer number (38661225).

Almost surely, 2^77322449 is an apocalyptic number.

It is an amenable number.

77322449 is a deficient number, since it is larger than the sum of its proper divisors (1).

77322449 is an equidigital number, since it uses as much as digits as its factorization.

77322449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 38.

The square root of 77322449 is about 8793.3184293531. The cubic root of 77322449 is about 426.0251129516.

The spelling of 77322449 in words is "seventy-seven million, three hundred twenty-two thousand, four hundred forty-nine".