690233 has 2 divisors, whose sum is σ = 690234. Its totient is φ = 690232.

The previous prime is 690187. The next prime is 690259. The reversal of 690233 is 332096.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595984 + 94249 = 772^2 + 307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690199 and 690208.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690233.

It is not a weakly prime, because it can be changed into another prime (690293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345116 + 345117.

It is an arithmetic number, because the mean of its divisors is an integer number (345117).

2⁶⁹⁰²³³ is an apocalyptic number.

It is an amenable number.

690233 is a deficient number, since it is larger than the sum of its proper divisors (1).

690233 is an equidigital number, since it uses as much as digits as its factorization.

690233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 690233 is about 830.8026239727. The cubic root of 690233 is about 88.3755045662.

The spelling of 690233 in words is "six hundred ninety thousand, two hundred thirty-three".