690772213 has 2 divisors, whose sum is σ = 690772214. Its totient is φ = 690772212.

The previous prime is 690772193. The next prime is 690772241. The reversal of 690772213 is 312277096.

690772213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 457232689 + 233539524 = 21383^2 + 15282^2 .

It is a cyclic number.

It is not a de Polignac number, because 690772213 - 2⁹ = 690771701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690772013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345386106 + 345386107.

It is an arithmetic number, because the mean of its divisors is an integer number (345386107).

Almost surely, 2^690772213 is an apocalyptic number.

It is an amenable number.

690772213 is a deficient number, since it is larger than the sum of its proper divisors (1).

690772213 is an equidigital number, since it uses as much as digits as its factorization.

690772213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 690772213 is about 26282.5457861296. The cubic root of 690772213 is about 883.9851168471.

The spelling of 690772213 in words is "six hundred ninety million, seven hundred seventy-two thousand, two hundred thirteen".