690073 has 2 divisors, whose sum is σ = 690074. Its totient is φ = 690072.

The previous prime is 690059. The next prime is 690089. The reversal of 690073 is 370096.

690073 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., 685584 + 4489 = 828^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 690073 - 2⁹ = 689561 is a prime.

690073 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (690673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345036 + 345037.

It is an arithmetic number, because the mean of its divisors is an integer number (345037).

2⁶⁹⁰⁰⁷³ is an apocalyptic number.

It is an amenable number.

690073 is a deficient number, since it is larger than the sum of its proper divisors (1).

690073 is an equidigital number, since it uses as much as digits as its factorization.

690073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 690073 is about 830.7063259660. The cubic root of 690073 is about 88.3686753875.

The spelling of 690073 in words is "six hundred ninety thousand, seventy-three".