9979772507 has 4 divisors (see below), whose sum is σ = 9981202560. Its totient is φ = 9978342456.

The previous prime is 9979772479. The next prime is 9979772521. The reversal of 9979772507 is 7052779799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9979772507 - 2²⁶ = 9912663643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9979772507.

It is not an unprimeable number, because it can be changed into a prime (9979772527) 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, 704507 + ... + 718532.

It is an arithmetic number, because the mean of its divisors is an integer number (2495300640).

Almost surely, 2^9979772507 is an apocalyptic number.

9979772507 is a deficient number, since it is larger than the sum of its proper divisors (1430053).

9979772507 is a wasteful number, since it uses less digits than its factorization.

9979772507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430052.

The product of its (nonzero) digits is 17503290, while the sum is 62.

The square root of 9979772507 is about 99898.8113392747. The cubic root of 9979772507 is about 2152.9810824092.

The spelling of 9979772507 in words is "nine billion, nine hundred seventy-nine million, seven hundred seventy-two thousand, five hundred seven".