77148629 has 2 divisors, whose sum is σ = 77148630. Its totient is φ = 77148628.

The previous prime is 77148623. The next prime is 77148653. The reversal of 77148629 is 92684177.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42315025 + 34833604 = 6505^2 + 5902^2 .

It is an emirp because it is prime and its reverse (92684177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77148629 - 2⁸ = 77148373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77148629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77148623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38574314 + 38574315.

It is an arithmetic number, because the mean of its divisors is an integer number (38574315).

Almost surely, 2^77148629 is an apocalyptic number.

It is an amenable number.

77148629 is a deficient number, since it is larger than the sum of its proper divisors (1).

77148629 is an equidigital number, since it uses as much as digits as its factorization.

77148629 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 77148629 is about 8783.4292278130. The cubic root of 77148629 is about 425.7056402128.

It can be divided in two parts, 77148 and 629, that added together give a palindrome (77777).

The spelling of 77148629 in words is "seventy-seven million, one hundred forty-eight thousand, six hundred twenty-nine".