77616853 has 2 divisors, whose sum is σ = 77616854. Its totient is φ = 77616852.

The previous prime is 77616841. The next prime is 77616859. The reversal of 77616853 is 35861677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52446564 + 25170289 = 7242^2 + 5017^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77616853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77616859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38808426 + 38808427.

It is an arithmetic number, because the mean of its divisors is an integer number (38808427).

Almost surely, 2^77616853 is an apocalyptic number.

It is an amenable number.

77616853 is a deficient number, since it is larger than the sum of its proper divisors (1).

77616853 is an equidigital number, since it uses as much as digits as its factorization.

77616853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 77616853 is about 8810.0427354242. The cubic root of 77616853 is about 426.5651227942.

The spelling of 77616853 in words is "seventy-seven million, six hundred sixteen thousand, eight hundred fifty-three".