774485893 has 2 divisors, whose sum is σ = 774485894. Its totient is φ = 774485892.

The previous prime is 774485891. The next prime is 774485909. The reversal of 774485893 is 398584477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763582689 + 10903204 = 27633^2 + 3302^2 .

It is an emirp because it is prime and its reverse (398584477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 774485893 - 2¹ = 774485891 is a prime.

Together with 774485891, 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 (774485891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387242946 + 387242947.

It is an arithmetic number, because the mean of its divisors is an integer number (387242947).

Almost surely, 2^774485893 is an apocalyptic number.

It is an amenable number.

774485893 is a deficient number, since it is larger than the sum of its proper divisors (1).

774485893 is an equidigital number, since it uses as much as digits as its factorization.

774485893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6773760, while the sum is 55.

The square root of 774485893 is about 27829.5866480262. The cubic root of 774485893 is about 918.3421201622.

The spelling of 774485893 in words is "seven hundred seventy-four million, four hundred eighty-five thousand, eight hundred ninety-three".