690323 has 2 divisors, whose sum is σ = 690324. Its totient is φ = 690322.

The previous prime is 690293. The next prime is 690341. The reversal of 690323 is 323096.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690323 - 2⁶ = 690259 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (693323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345161 + 345162.

It is an arithmetic number, because the mean of its divisors is an integer number (345162).

2⁶⁹⁰³²³ is an apocalyptic number.

690323 is a deficient number, since it is larger than the sum of its proper divisors (1).

690323 is an equidigital number, since it uses as much as digits as its factorization.

690323 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 690323 is about 830.8567866967. The cubic root of 690323 is about 88.3793455154.

The spelling of 690323 in words is "six hundred ninety thousand, three hundred twenty-three".