77285513 has 2 divisors, whose sum is σ = 77285514. Its totient is φ = 77285512.

The previous prime is 77285479. The next prime is 77285539. The reversal of 77285513 is 31558277.

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., 58171129 + 19114384 = 7627^2 + 4372^2 .

It is a cyclic number.

It is not a de Polignac number, because 77285513 - 2¹⁰ = 77284489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77285413) 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, 38642756 + 38642757.

It is an arithmetic number, because the mean of its divisors is an integer number (38642757).

Almost surely, 2^77285513 is an apocalyptic number.

It is an amenable number.

77285513 is a deficient number, since it is larger than the sum of its proper divisors (1).

77285513 is an equidigital number, since it uses as much as digits as its factorization.

77285513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 38.

The square root of 77285513 is about 8791.2179474746. The cubic root of 77285513 is about 425.9572664636.

The spelling of 77285513 in words is "seventy-seven million, two hundred eighty-five thousand, five hundred thirteen".