99940849 has 2 divisors, whose sum is σ = 99940850. Its totient is φ = 99940848.

The previous prime is 99940843. The next prime is 99940871. The reversal of 99940849 is 94804999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96177249 + 3763600 = 9807^2 + 1940^2 .

It is a cyclic number.

It is not a de Polignac number, because 99940849 - 2⁷ = 99940721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99940796 and 99940805.

It is not a weakly prime, because it can be changed into another prime (99940843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49970424 + 49970425.

It is an arithmetic number, because the mean of its divisors is an integer number (49970425).

Almost surely, 2^99940849 is an apocalyptic number.

It is an amenable number.

99940849 is a deficient number, since it is larger than the sum of its proper divisors (1).

99940849 is an equidigital number, since it uses as much as digits as its factorization.

99940849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 99940849 is about 9997.0420125155. The cubic root of 99940849 is about 464.0673471037.

The spelling of 99940849 in words is "ninety-nine million, nine hundred forty thousand, eight hundred forty-nine".