77213113 has 2 divisors, whose sum is σ = 77213114. Its totient is φ = 77213112.

The previous prime is 77213111. The next prime is 77213119. The reversal of 77213113 is 31131277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50865424 + 26347689 = 7132^2 + 5133^2 .

It is a cyclic number.

It is not a de Polignac number, because 77213113 - 2¹ = 77213111 is a prime.

Together with 77213111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (77213111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38606556 + 38606557.

It is an arithmetic number, because the mean of its divisors is an integer number (38606557).

Almost surely, 2^77213113 is an apocalyptic number.

It is an amenable number.

77213113 is a deficient number, since it is larger than the sum of its proper divisors (1).

77213113 is an equidigital number, since it uses as much as digits as its factorization.

77213113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 882, while the sum is 25.

The square root of 77213113 is about 8787.0992369496. The cubic root of 77213113 is about 425.8242146153.

The spelling of 77213113 in words is "seventy-seven million, two hundred thirteen thousand, one hundred thirteen".