77705141 has 2 divisors, whose sum is σ = 77705142. Its totient is φ = 77705140.

The previous prime is 77705129. The next prime is 77705203. The reversal of 77705141 is 14150777.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53597041 + 24108100 = 7321^2 + 4910^2 .

It is an emirp because it is prime and its reverse (14150777) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77705141 - 2¹⁰ = 77704117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77705098 and 77705107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77705101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38852570 + 38852571.

It is an arithmetic number, because the mean of its divisors is an integer number (38852571).

Almost surely, 2^77705141 is an apocalyptic number.

It is an amenable number.

77705141 is a deficient number, since it is larger than the sum of its proper divisors (1).

77705141 is an equidigital number, since it uses as much as digits as its factorization.

77705141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6860, while the sum is 32.

The square root of 77705141 is about 8815.0519567385. The cubic root of 77705141 is about 426.7267986403.

The spelling of 77705141 in words is "seventy-seven million, seven hundred five thousand, one hundred forty-one".