9969724091 has 2 divisors, whose sum is σ = 9969724092. Its totient is φ = 9969724090.

The previous prime is 9969724073. The next prime is 9969724147. The reversal of 9969724091 is 1904279699.

It is an a-pointer prime, because the next prime (9969724147) can be obtained adding 9969724091 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9969724091 - 2⁶ = 9969724027 is a prime.

It is a super-3 number, since 3×9969724091³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (9969724591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4984862045 + 4984862046.

It is an arithmetic number, because the mean of its divisors is an integer number (4984862046).

Almost surely, 2^9969724091 is an apocalyptic number.

9969724091 is a deficient number, since it is larger than the sum of its proper divisors (1).

9969724091 is an equidigital number, since it uses as much as digits as its factorization.

9969724091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 56.

The square root of 9969724091 is about 99848.5057023890. The cubic root of 9969724091 is about 2152.2582431342.

The spelling of 9969724091 in words is "nine billion, nine hundred sixty-nine million, seven hundred twenty-four thousand, ninety-one".