769919681 has 8 divisors (see below), whose sum is σ = 816294024. Its totient is φ = 723665920.

The previous prime is 769919671. The next prime is 769919693. The reversal of 769919681 is 186919967.

It can be written as a sum of positive squares in 4 ways, for example, as 35509681 + 734410000 = 5959^2 + 27100^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 769919681 - 2⁶ = 769919617 is a prime.

It is a super-2 number, since 2×769919681² = 1185552630382283522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (769919621) 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 in 7 ways as a sum of consecutive naturals, for example, 16820 + ... + 42693.

It is an arithmetic number, because the mean of its divisors is an integer number (102036753).

Almost surely, 2^769919681 is an apocalyptic number.

It is an amenable number.

769919681 is a deficient number, since it is larger than the sum of its proper divisors (46374343).

769919681 is a wasteful number, since it uses less digits than its factorization.

769919681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60291.

The product of its digits is 1469664, while the sum is 56.

The square root of 769919681 is about 27747.4265653592. The cubic root of 769919681 is about 916.5337752183.

The spelling of 769919681 in words is "seven hundred sixty-nine million, nine hundred nineteen thousand, six hundred eighty-one".