99919249 has 2 divisors, whose sum is σ = 99919250. Its totient is φ = 99919248.

The previous prime is 99919213. The next prime is 99919283. The reversal of 99919249 is 94291999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99700225 + 219024 = 9985^2 + 468^2 .

It is a cyclic number.

It is not a de Polignac number, because 99919249 - 2⁹ = 99918737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99919196 and 99919205.

It is not a weakly prime, because it can be changed into another prime (99919289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49959624 + 49959625.

It is an arithmetic number, because the mean of its divisors is an integer number (49959625).

Almost surely, 2^99919249 is an apocalyptic number.

It is an amenable number.

99919249 is a deficient number, since it is larger than the sum of its proper divisors (1).

99919249 is an equidigital number, since it uses as much as digits as its factorization.

99919249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472392, while the sum is 52.

The square root of 99919249 is about 9995.9616345802. The cubic root of 99919249 is about 464.0339120701.

The spelling of 99919249 in words is "ninety-nine million, nine hundred nineteen thousand, two hundred forty-nine".