690499 has 4 divisors (see below), whose sum is σ = 696064. Its totient is φ = 684936.

The previous prime is 690493. The next prime is 690509. The reversal of 690499 is 994096.

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

It is a cyclic number.

It is not a de Polignac number, because 690499 - 2³ = 690491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690491) 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, 2592 + ... + 2845.

It is an arithmetic number, because the mean of its divisors is an integer number (174016).

2⁶⁹⁰⁴⁹⁹ is an apocalyptic number.

690499 is a deficient number, since it is larger than the sum of its proper divisors (5565).

690499 is a wasteful number, since it uses less digits than its factorization.

690499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 690499 is about 830.9626947102. The cubic root of 690499 is about 88.3868557404.

The spelling of 690499 in words is "six hundred ninety thousand, four hundred ninety-nine".