213030997 has 2 divisors, whose sum is σ = 213030998. Its totient is φ = 213030996.

The previous prime is 213030967. The next prime is 213031001. The reversal of 213030997 is 799030312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210076036 + 2954961 = 14494^2 + 1719^2 .

It is a cyclic number.

It is not a de Polignac number, because 213030997 - 2¹⁵ = 212998229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213030967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106515498 + 106515499.

It is an arithmetic number, because the mean of its divisors is an integer number (106515499).

Almost surely, 2^213030997 is an apocalyptic number.

It is an amenable number.

213030997 is a deficient number, since it is larger than the sum of its proper divisors (1).

213030997 is an equidigital number, since it uses as much as digits as its factorization.

213030997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 213030997 is about 14595.5814204162. The cubic root of 213030997 is about 597.2382303670.

The spelling of 213030997 in words is "two hundred thirteen million, thirty thousand, nine hundred ninety-seven".