77530853 has 2 divisors, whose sum is σ = 77530854. Its totient is φ = 77530852.

The previous prime is 77530847. The next prime is 77530879. The reversal of 77530853 is 35803577.

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., 65820769 + 11710084 = 8113^2 + 3422^2 .

It is an emirp because it is prime and its reverse (35803577) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77530853 is a prime.

It is a super-2 number, since 2×77530853² = 12022066333815218, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77530813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38765426 + 38765427.

It is an arithmetic number, because the mean of its divisors is an integer number (38765427).

Almost surely, 2^77530853 is an apocalyptic number.

It is an amenable number.

77530853 is a deficient number, since it is larger than the sum of its proper divisors (1).

77530853 is an equidigital number, since it uses as much as digits as its factorization.

77530853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 77530853 is about 8805.1605891091. The cubic root of 77530853 is about 426.4075188873.

The spelling of 77530853 in words is "seventy-seven million, five hundred thirty thousand, eight hundred fifty-three".