9964380977 has 4 divisors (see below), whose sum is σ = 9968698740. Its totient is φ = 9960063216.

The previous prime is 9964380953. The next prime is 9964380991. The reversal of 9964380977 is 7790834699.

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 8816458816 + 1147922161 = 93896^2 + 33881^2 .

It is a cyclic number.

It is not a de Polignac number, because 9964380977 - 2¹⁴ = 9964364593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9964380997) 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, 2155418 + ... + 2160035.

It is an arithmetic number, because the mean of its divisors is an integer number (2492174685).

Almost surely, 2^9964380977 is an apocalyptic number.

It is an amenable number.

9964380977 is a deficient number, since it is larger than the sum of its proper divisors (4317763).

9964380977 is a wasteful number, since it uses less digits than its factorization.

9964380977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4317762.

The product of its (nonzero) digits is 20575296, while the sum is 62.

The square root of 9964380977 is about 99821.7460125798. The cubic root of 9964380977 is about 2151.8736849783.

The spelling of 9964380977 in words is "nine billion, nine hundred sixty-four million, three hundred eighty thousand, nine hundred seventy-seven".