690447 has 4 divisors (see below), whose sum is σ = 920600. Its totient is φ = 460296.

The previous prime is 690439. The next prime is 690449. The reversal of 690447 is 744096.

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

It is not a de Polignac number, because 690447 - 2³ = 690439 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115072 + ... + 115077.

It is an arithmetic number, because the mean of its divisors is an integer number (230150).

2⁶⁹⁰⁴⁴⁷ is an apocalyptic number.

690447 is a deficient number, since it is larger than the sum of its proper divisors (230153).

690447 is a wasteful number, since it uses less digits than its factorization.

690447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230152.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 690447 is about 830.9314051112. The cubic root of 690447 is about 88.3846369431.

The spelling of 690447 in words is "six hundred ninety thousand, four hundred forty-seven".