690293 has 2 divisors, whose sum is σ = 690294. Its totient is φ = 690292.

The previous prime is 690281. The next prime is 690323. The reversal of 690293 is 392096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 47089 = 802^2 + 217^2 .

It is a cyclic number.

It is not a de Polignac number, because 690293 - 2⁸ = 690037 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345146 + 345147.

It is an arithmetic number, because the mean of its divisors is an integer number (345147).

2⁶⁹⁰²⁹³ is an apocalyptic number.

It is an amenable number.

690293 is a deficient number, since it is larger than the sum of its proper divisors (1).

690293 is an equidigital number, since it uses as much as digits as its factorization.

690293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 690293 is about 830.8387328477. The cubic root of 690293 is about 88.3780652361.

The spelling of 690293 in words is "six hundred ninety thousand, two hundred ninety-three".