774272813 has 4 divisors (see below), whose sum is σ = 788881788. Its totient is φ = 759663840.

The previous prime is 774272809. The next prime is 774272831. The reversal of 774272813 is 318272477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 664505284 + 109767529 = 25778^2 + 10477^2 .

It is not a de Polignac number, because 774272813 - 2² = 774272809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (774172813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7304408 + ... + 7304513.

It is an arithmetic number, because the mean of its divisors is an integer number (197220447).

Almost surely, 2^774272813 is an apocalyptic number.

It is an amenable number.

774272813 is a deficient number, since it is larger than the sum of its proper divisors (14608975).

774272813 is a wasteful number, since it uses less digits than its factorization.

774272813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608974.

The product of its digits is 131712, while the sum is 41.

The square root of 774272813 is about 27825.7580849112. The cubic root of 774272813 is about 918.2578929826.

The spelling of 774272813 in words is "seven hundred seventy-four million, two hundred seventy-two thousand, eight hundred thirteen".