769709591101021 has 2 divisors, whose sum is σ = 769709591101022. Its totient is φ = 769709591101020.

The previous prime is 769709591101019. The next prime is 769709591101103. The reversal of 769709591101021 is 120101195907967.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 668701844932900 + 101007746168121 = 25859270^2 + 10050261^2 .

It is an emirp because it is prime and its reverse (120101195907967) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 769709591101021 - 2¹ = 769709591101019 is a prime.

Together with 769709591101019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (769709591101421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384854795550510 + 384854795550511.

It is an arithmetic number, because the mean of its divisors is an integer number (384854795550511).

Almost surely, 2^{769709591101021} is an apocalyptic number.

It is an amenable number.

769709591101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

769709591101021 is an equidigital number, since it uses as much as digits as its factorization.

769709591101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2143260, while the sum is 58.

The spelling of 769709591101021 in words is "seven hundred sixty-nine trillion, seven hundred nine billion, five hundred ninety-one million, one hundred one thousand, twenty-one".