77010001001 has 2 divisors, whose sum is σ = 77010001002. Its totient is φ = 77010001000.

The previous prime is 77010000989. The next prime is 77010001043. The reversal of 77010001001 is 10010001077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75823129600 + 1186871401 = 275360^2 + 34451^2 .

It is an emirp because it is prime and its reverse (10010001077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77010001001 - 2³⁰ = 75936259177 is a prime.

It is not a weakly prime, because it can be changed into another prime (77010007001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38505000500 + 38505000501.

It is an arithmetic number, because the mean of its divisors is an integer number (38505000501).

Almost surely, 2^77010001001 is an apocalyptic number.

It is an amenable number.

77010001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

77010001001 is an equidigital number, since it uses as much as digits as its factorization.

77010001001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49, while the sum is 17.

Adding to 77010001001 its reverse (10010001077), we get a palindrome (87020002078).

The spelling of 77010001001 in words is "seventy-seven billion, ten million, one thousand, one".