690573833 has 2 divisors, whose sum is σ = 690573834. Its totient is φ = 690573832.

The previous prime is 690573797. The next prime is 690573859. The reversal of 690573833 is 338375096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 635695369 + 54878464 = 25213^2 + 7408^2 .

It is a cyclic number.

It is not a de Polignac number, because 690573833 - 2¹⁴ = 690557449 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (690573893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345286916 + 345286917.

It is an arithmetic number, because the mean of its divisors is an integer number (345286917).

Almost surely, 2^690573833 is an apocalyptic number.

It is an amenable number.

690573833 is a deficient number, since it is larger than the sum of its proper divisors (1).

690573833 is an equidigital number, since it uses as much as digits as its factorization.

690573833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 44.

The square root of 690573833 is about 26278.7715276038. The cubic root of 690573833 is about 883.9004860748.

The spelling of 690573833 in words is "six hundred ninety million, five hundred seventy-three thousand, eight hundred thirty-three".