690087 has 8 divisors (see below), whose sum is σ = 945136. Its totient is φ = 447552.

The previous prime is 690073. The next prime is 690089. The reversal of 690087 is 780096.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690087 - 2⁷ = 689959 is a prime.

It is a super-3 number, since 3×690087³ = 985899833305465509, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690087.

It is not an unprimeable number, because it can be changed into a prime (690089) 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 in 7 ways as a sum of consecutive naturals, for example, 2998 + ... + 3219.

It is an arithmetic number, because the mean of its divisors is an integer number (118142).

2⁶⁹⁰⁰⁸⁷ is an apocalyptic number.

690087 is a deficient number, since it is larger than the sum of its proper divisors (255049).

690087 is a wasteful number, since it uses less digits than its factorization.

690087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 690087 is about 830.7147524873. The cubic root of 690087 is about 88.3692729828.

Subtracting 690087 from its reverse (780096), we obtain a palindrome (90009).

The spelling of 690087 in words is "six hundred ninety thousand, eighty-seven".