99519281 has 2 divisors, whose sum is σ = 99519282. Its totient is φ = 99519280.

The previous prime is 99519227. The next prime is 99519293. The reversal of 99519281 is 18291599.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92544400 + 6974881 = 9620^2 + 2641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99519281 is a prime.

It is a super-2 number, since 2×99519281² = 19808174581513922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99519181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49759640 + 49759641.

It is an arithmetic number, because the mean of its divisors is an integer number (49759641).

Almost surely, 2^99519281 is an apocalyptic number.

It is an amenable number.

99519281 is a deficient number, since it is larger than the sum of its proper divisors (1).

99519281 is an equidigital number, since it uses as much as digits as its factorization.

99519281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 44.

The square root of 99519281 is about 9975.9350940150. The cubic root of 99519281 is about 463.4139217114.

The spelling of 99519281 in words is "ninety-nine million, five hundred nineteen thousand, two hundred eighty-one".