9979924511 has 4 divisors (see below), whose sum is σ = 10566978912. Its totient is φ = 9392870112.

The previous prime is 9979924463. The next prime is 9979924523. The reversal of 9979924511 is 1154299799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1154299799 = 19 ⋅60752621.

It is a cyclic number.

It is not a de Polignac number, because 9979924511 - 2¹⁸ = 9979662367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979924111) 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, 293527175 + ... + 293527208.

It is an arithmetic number, because the mean of its divisors is an integer number (2641744728).

Almost surely, 2^9979924511 is an apocalyptic number.

9979924511 is a deficient number, since it is larger than the sum of its proper divisors (587054401).

9979924511 is a wasteful number, since it uses less digits than its factorization.

9979924511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587054400.

The product of its digits is 1837080, while the sum is 56.

The square root of 9979924511 is about 99899.5721262108. The cubic root of 9979924511 is about 2152.9920131886.

The spelling of 9979924511 in words is "nine billion, nine hundred seventy-nine million, nine hundred twenty-four thousand, five hundred eleven".