99221429 has 2 divisors, whose sum is σ = 99221430. Its totient is φ = 99221428.

The previous prime is 99221413. The next prime is 99221443. The reversal of 99221429 is 92412299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72420100 + 26801329 = 8510^2 + 5177^2 .

It is a cyclic number.

It is not a de Polignac number, because 99221429 - 2⁴ = 99221413 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99221392 and 99221401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99221449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49610714 + 49610715.

It is an arithmetic number, because the mean of its divisors is an integer number (49610715).

Almost surely, 2^99221429 is an apocalyptic number.

It is an amenable number.

99221429 is a deficient number, since it is larger than the sum of its proper divisors (1).

99221429 is an equidigital number, since it uses as much as digits as its factorization.

99221429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 99221429 is about 9960.9953819887. The cubic root of 99221429 is about 462.9511413876.

The spelling of 99221429 in words is "ninety-nine million, two hundred twenty-one thousand, four hundred twenty-nine".