773640447 has 4 divisors (see below), whose sum is σ = 1031520600. Its totient is φ = 515760296.

The previous prime is 773640407. The next prime is 773640449. The reversal of 773640447 is 744046377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744046377 = 3 ⋅248015459.

It is a cyclic number.

It is not a de Polignac number, because 773640447 - 2⁶ = 773640383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 773640399 and 773640408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (773640449) 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, 128940072 + ... + 128940077.

It is an arithmetic number, because the mean of its divisors is an integer number (257880150).

Almost surely, 2^773640447 is an apocalyptic number.

773640447 is a deficient number, since it is larger than the sum of its proper divisors (257880153).

773640447 is a wasteful number, since it uses less digits than its factorization.

773640447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257880152.

The product of its (nonzero) digits is 395136, while the sum is 42.

The square root of 773640447 is about 27814.3928030076. The cubic root of 773640447 is about 918.0078376119.

The spelling of 773640447 in words is "seven hundred seventy-three million, six hundred forty thousand, four hundred forty-seven".