77065829 has 2 divisors, whose sum is σ = 77065830. Its totient is φ = 77065828.

The previous prime is 77065771. The next prime is 77065867. The reversal of 77065829 is 92856077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43692100 + 33373729 = 6610^2 + 5777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77065829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77065829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77065889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38532914 + 38532915.

It is an arithmetic number, because the mean of its divisors is an integer number (38532915).

Almost surely, 2^77065829 is an apocalyptic number.

It is an amenable number.

77065829 is a deficient number, since it is larger than the sum of its proper divisors (1).

77065829 is an equidigital number, since it uses as much as digits as its factorization.

77065829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 77065829 is about 8778.7145414349. The cubic root of 77065829 is about 425.5532890729.

The spelling of 77065829 in words is "seventy-seven million, sixty-five thousand, eight hundred twenty-nine".