690622 has 4 divisors (see below), whose sum is σ = 1035936. Its totient is φ = 345310.

The previous prime is 690611. The next prime is 690629. The reversal of 690622 is 226096.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690629) 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, 172654 + ... + 172657.

It is an arithmetic number, because the mean of its divisors is an integer number (258984).

2⁶⁹⁰⁶²² is an apocalyptic number.

690622 is a deficient number, since it is larger than the sum of its proper divisors (345314).

690622 is a wasteful number, since it uses less digits than its factorization.

690622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345313.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 690622 is about 831.0367019573. The cubic root of 690622 is about 88.3921036059.

The spelling of 690622 in words is "six hundred ninety thousand, six hundred twenty-two".