9913913777 has 4 divisors (see below), whose sum is σ = 9938637156. Its totient is φ = 9889190400.

The previous prime is 9913913771. The next prime is 9913913831. The reversal of 9913913777 is 7773193199.

9913913777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7773193199 = 3767 ⋅2063497.

It can be written as a sum of positive squares in 2 ways, for example, as 9672919201 + 240994576 = 98351^2 + 15524^2 .

It is a cyclic number.

It is not a de Polignac number, because 9913913777 - 2¹⁰ = 9913912753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9913913771) 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, 12361088 + ... + 12361889.

It is an arithmetic number, because the mean of its divisors is an integer number (2484659289).

Almost surely, 2^9913913777 is an apocalyptic number.

It is an amenable number.

9913913777 is a deficient number, since it is larger than the sum of its proper divisors (24723379).

9913913777 is a wasteful number, since it uses less digits than its factorization.

9913913777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24723378.

The product of its digits is 2250423, while the sum is 56.

The square root of 9913913777 is about 99568.6385213738. The cubic root of 9913913777 is about 2148.2346263416.

The spelling of 9913913777 in words is "nine billion, nine hundred thirteen million, nine hundred thirteen thousand, seven hundred seventy-seven".