99790213 has 2 divisors, whose sum is σ = 99790214. Its totient is φ = 99790212.

The previous prime is 99790199. The next prime is 99790237. The reversal of 99790213 is 31209799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83484769 + 16305444 = 9137^2 + 4038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99790213 is a prime.

It is a super-2 number, since 2×99790213² = 19916173221170738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99790253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49895106 + 49895107.

It is an arithmetic number, because the mean of its divisors is an integer number (49895107).

Almost surely, 2^99790213 is an apocalyptic number.

It is an amenable number.

99790213 is a deficient number, since it is larger than the sum of its proper divisors (1).

99790213 is an equidigital number, since it uses as much as digits as its factorization.

99790213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 99790213 is about 9989.5051428987. The cubic root of 99790213 is about 463.8340744541.

The spelling of 99790213 in words is "ninety-nine million, seven hundred ninety thousand, two hundred thirteen".