9776405 has 4 divisors (see below), whose sum is σ = 11731692. Its totient is φ = 7821120.

The previous prime is 9776387. The next prime is 9776407. The reversal of 9776405 is 5046779.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5046779 = 149 ⋅33871.

It can be written as a sum of positive squares in 2 ways, for example, as 5080516 + 4695889 = 2254^2 + 2167^2 .

It is not a de Polignac number, because 9776405 - 2⁶ = 9776341 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9776407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977636 + ... + 977645.

It is an arithmetic number, because the mean of its divisors is an integer number (2932923).

Almost surely, 2^9776405 is an apocalyptic number.

It is an amenable number.

9776405 is a deficient number, since it is larger than the sum of its proper divisors (1955287).

9776405 is a wasteful number, since it uses less digits than its factorization.

9776405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955286.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 9776405 is about 3126.7243242729. The cubic root of 9776405 is about 213.8256141862.

The spelling of 9776405 in words is "nine million, seven hundred seventy-six thousand, four hundred five".