77144017 has 2 divisors, whose sum is σ = 77144018. Its totient is φ = 77144016.

The previous prime is 77143993. The next prime is 77144029. The reversal of 77144017 is 71044177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71927361 + 5216656 = 8481^2 + 2284^2 .

It is an emirp because it is prime and its reverse (71044177) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77144017 - 2⁷ = 77143889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77144017.

It is not a weakly prime, because it can be changed into another prime (77144087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38572008 + 38572009.

It is an arithmetic number, because the mean of its divisors is an integer number (38572009).

Almost surely, 2^77144017 is an apocalyptic number.

It is an amenable number.

77144017 is a deficient number, since it is larger than the sum of its proper divisors (1).

77144017 is an equidigital number, since it uses as much as digits as its factorization.

77144017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 77144017 is about 8783.1666840611. The cubic root of 77144017 is about 425.6971570483.

The spelling of 77144017 in words is "seventy-seven million, one hundred forty-four thousand, seventeen".