774808421 has 4 divisors (see below), whose sum is σ = 775026252. Its totient is φ = 774590592.

The previous prime is 774808417. The next prime is 774808423. The reversal of 774808421 is 124808477.

It is a happy number.

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 21031396 + 753777025 = 4586^2 + 27455^2 .

It is a cyclic number.

It is not a de Polignac number, because 774808421 - 2² = 774808417 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 (774808423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103490 + ... + 110723.

It is an arithmetic number, because the mean of its divisors is an integer number (193756563).

Almost surely, 2^774808421 is an apocalyptic number.

It is an amenable number.

774808421 is a deficient number, since it is larger than the sum of its proper divisors (217831).

774808421 is a wasteful number, since it uses less digits than its factorization.

774808421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217830.

The product of its (nonzero) digits is 100352, while the sum is 41.

The square root of 774808421 is about 27835.3807410641. The cubic root of 774808421 is about 918.4695810340.

The spelling of 774808421 in words is "seven hundred seventy-four million, eight hundred eight thousand, four hundred twenty-one".