99749813447 has 2 divisors, whose sum is σ = 99749813448. Its totient is φ = 99749813446.

The previous prime is 99749813399. The next prime is 99749813483. The reversal of 99749813447 is 74431894799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99749813447 - 2¹⁰ = 99749812423 is a prime.

It is a super-2 number, since 2×99749813447² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99749813347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49874906723 + 49874906724.

It is an arithmetic number, because the mean of its divisors is an integer number (49874906724).

Almost surely, 2^99749813447 is an apocalyptic number.

99749813447 is a deficient number, since it is larger than the sum of its proper divisors (1).

99749813447 is an equidigital number, since it uses as much as digits as its factorization.

99749813447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54867456, while the sum is 65.

The spelling of 99749813447 in words is "ninety-nine billion, seven hundred forty-nine million, eight hundred thirteen thousand, four hundred forty-seven".