771895089 has 63 divisors (see below), whose sum is σ = 1350746137. Its totient is φ = 441082908.

The previous prime is 771895067. The next prime is 771895093. The reversal of 771895089 is 980598177.

The square root of 771895089 is 27783.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (63).

It is not a de Polignac number, because 771895089 - 2²¹ = 769797937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (771895039) 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 62 ways as a sum of consecutive naturals, for example, 110270724 + ... + 110270730.

Almost surely, 2^771895089 is an apocalyptic number.

771895089 is the 27783-rd square number.

771895089 is the 13892-nd centered octagonal number.

It is an amenable number.

771895089 is a deficient number, since it is larger than the sum of its proper divisors (578851048).

771895089 is an frugal number, since it uses more digits than its factorization.

771895089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The cubic root of 771895089 is about 917.3169659659.

The spelling of 771895089 in words is "seven hundred seventy-one million, eight hundred ninety-five thousand, eighty-nine".