690053233 has 2 divisors, whose sum is σ = 690053234. Its totient is φ = 690053232.

The previous prime is 690053213. The next prime is 690053261. The reversal of 690053233 is 332350096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 562069264 + 127983969 = 23708^2 + 11313^2 .

It is a cyclic number.

It is not a de Polignac number, because 690053233 - 2²¹ = 687956081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690053195 and 690053204.

It is not a weakly prime, because it can be changed into another prime (690053213) 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, 345026616 + 345026617.

It is an arithmetic number, because the mean of its divisors is an integer number (345026617).

Almost surely, 2^690053233 is an apocalyptic number.

It is an amenable number.

690053233 is a deficient number, since it is larger than the sum of its proper divisors (1).

690053233 is an equidigital number, since it uses as much as digits as its factorization.

690053233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 31.

The square root of 690053233 is about 26268.8643264226. The cubic root of 690053233 is about 883.6783161189.

The spelling of 690053233 in words is "six hundred ninety million, fifty-three thousand, two hundred thirty-three".