690002 has 4 divisors (see below), whose sum is σ = 1035006. Its totient is φ = 345000.

The previous prime is 689987. The next prime is 690037. The reversal of 690002 is 200096.

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

It can be written as a sum of positive squares in only one way, i.e., 477481 + 212521 = 691^2 + 461^2 .

It is a super-2 number, since 2×690002² = 952205520008, which contains 22 as substring.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172499 + ... + 172502.

2⁶⁹⁰⁰⁰² is an apocalyptic number.

690002 is a deficient number, since it is larger than the sum of its proper divisors (345004).

690002 is a wasteful number, since it uses less digits than its factorization.

690002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345003.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 690002 is about 830.6635901495. The cubic root of 690002 is about 88.3656446013.

Adding to 690002 its reverse (200096), we get a palindrome (890098).

The spelling of 690002 in words is "six hundred ninety thousand, two".