771334891 has 4 divisors (see below), whose sum is σ = 771476992. Its totient is φ = 771192792.

The previous prime is 771334867. The next prime is 771334909. The reversal of 771334891 is 198433177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198433177 = 151 ⋅1314127.

It is a cyclic number.

It is not a de Polignac number, because 771334891 - 2⁹ = 771334379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (771634891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62571 + ... + 73876.

It is an arithmetic number, because the mean of its divisors is an integer number (192869248).

Almost surely, 2^771334891 is an apocalyptic number.

771334891 is a deficient number, since it is larger than the sum of its proper divisors (142101).

771334891 is a wasteful number, since it uses less digits than its factorization.

771334891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142100.

The product of its digits is 127008, while the sum is 43.

The square root of 771334891 is about 27772.9165015128. The cubic root of 771334891 is about 917.0949999233.

The spelling of 771334891 in words is "seven hundred seventy-one million, three hundred thirty-four thousand, eight hundred ninety-one".