99945749 has 2 divisors, whose sum is σ = 99945750. Its totient is φ = 99945748.

The previous prime is 99945743. The next prime is 99945751. The reversal of 99945749 is 94754999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70677649 + 29268100 = 8407^2 + 5410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99945749 is a prime.

It is a Sophie Germain prime.

Together with 99945751, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 99945694 and 99945703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99945743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49972874 + 49972875.

It is an arithmetic number, because the mean of its divisors is an integer number (49972875).

Almost surely, 2^99945749 is an apocalyptic number.

It is an amenable number.

99945749 is a deficient number, since it is larger than the sum of its proper divisors (1).

99945749 is an equidigital number, since it uses as much as digits as its factorization.

99945749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 56.

The square root of 99945749 is about 9997.2870820038. The cubic root of 99945749 is about 464.0749312326.

The spelling of 99945749 in words is "ninety-nine million, nine hundred forty-five thousand, seven hundred forty-nine".