9979797541 has 16 divisors (see below), whose sum is σ = 11514671104. Its totient is φ = 8472449664.

The previous prime is 9979797539. The next prime is 9979797599. The reversal of 9979797541 is 1457979799.

It is not a de Polignac number, because 9979797541 - 2¹ = 9979797539 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 (9979797241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535801 + ... + 554113.

It is an arithmetic number, because the mean of its divisors is an integer number (719666944).

Almost surely, 2^9979797541 is an apocalyptic number.

It is an amenable number.

9979797541 is a deficient number, since it is larger than the sum of its proper divisors (1534873563).

9979797541 is a wasteful number, since it uses less digits than its factorization.

9979797541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19060.

The product of its digits is 45008460, while the sum is 67.

The square root of 9979797541 is about 99898.9366359823. The cubic root of 9979797541 is about 2152.9828826401.

The spelling of 9979797541 in words is "nine billion, nine hundred seventy-nine million, seven hundred ninety-seven thousand, five hundred forty-one".