77536489 has 2 divisors, whose sum is σ = 77536490. Its totient is φ = 77536488.

The previous prime is 77536483. The next prime is 77536493. The reversal of 77536489 is 98463577.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77528025 + 8464 = 8805^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 77536489 - 2⁹ = 77535977 is a prime.

It is not a weakly prime, because it can be changed into another prime (77536483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38768244 + 38768245.

It is an arithmetic number, because the mean of its divisors is an integer number (38768245).

Almost surely, 2^77536489 is an apocalyptic number.

It is an amenable number.

77536489 is a deficient number, since it is larger than the sum of its proper divisors (1).

77536489 is an equidigital number, since it uses as much as digits as its factorization.

77536489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 77536489 is about 8805.4806228848. The cubic root of 77536489 is about 426.4178510086.

The spelling of 77536489 in words is "seventy-seven million, five hundred thirty-six thousand, four hundred eighty-nine".