77135189 has 2 divisors, whose sum is σ = 77135190. Its totient is φ = 77135188.

The previous prime is 77135173. The next prime is 77135197. The reversal of 77135189 is 98153177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43692100 + 33443089 = 6610^2 + 5783^2 .

It is an emirp because it is prime and its reverse (98153177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77135189 - 2⁴ = 77135173 is a prime.

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 (77135119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38567594 + 38567595.

It is an arithmetic number, because the mean of its divisors is an integer number (38567595).

Almost surely, 2^77135189 is an apocalyptic number.

It is an amenable number.

77135189 is a deficient number, since it is larger than the sum of its proper divisors (1).

77135189 is an equidigital number, since it uses as much as digits as its factorization.

77135189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 41.

The square root of 77135189 is about 8782.6641174532. The cubic root of 77135189 is about 425.6809181658.

The spelling of 77135189 in words is "seventy-seven million, one hundred thirty-five thousand, one hundred eighty-nine".