690252533 has 2 divisors, whose sum is σ = 690252534. Its totient is φ = 690252532.

The previous prime is 690252503. The next prime is 690252587. The reversal of 690252533 is 335252096.

It is a happy number.

690252533 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., 475981489 + 214271044 = 21817^2 + 14638^2 .

It is a cyclic number.

It is not a de Polignac number, because 690252533 - 2¹⁴ = 690236149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690252493 and 690252502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690252503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345126266 + 345126267.

It is an arithmetic number, because the mean of its divisors is an integer number (345126267).

Almost surely, 2^690252533 is an apocalyptic number.

It is an amenable number.

690252533 is a deficient number, since it is larger than the sum of its proper divisors (1).

690252533 is an equidigital number, since it uses as much as digits as its factorization.

690252533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 690252533 is about 26272.6575168939. The cubic root of 690252533 is about 883.7633820855.

The spelling of 690252533 in words is "six hundred ninety million, two hundred fifty-two thousand, five hundred thirty-three".