9777430993 has 4 divisors (see below), whose sum is σ = 10666288368. Its totient is φ = 8888573620.

The previous prime is 9777430979. The next prime is 9777431023. The reversal of 9777430993 is 3990347779.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3990347779 = 11 ⋅362758889.

It is a cyclic number.

It is not a de Polignac number, because 9777430993 - 2¹³ = 9777422801 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9777430903) 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, 444428671 + ... + 444428692.

It is an arithmetic number, because the mean of its divisors is an integer number (2666572092).

Almost surely, 2^9777430993 is an apocalyptic number.

It is an amenable number.

9777430993 is a deficient number, since it is larger than the sum of its proper divisors (888857375).

9777430993 is a wasteful number, since it uses less digits than its factorization.

9777430993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888857374.

The product of its (nonzero) digits is 9001692, while the sum is 58.

The square root of 9777430993 is about 98880.8929621896. The cubic root of 9777430993 is about 2138.3309396056.

The spelling of 9777430993 in words is "nine billion, seven hundred seventy-seven million, four hundred thirty thousand, nine hundred ninety-three".