690733 has 4 divisors (see below), whose sum is σ = 697180. Its totient is φ = 684288.

The previous prime is 690721. The next prime is 690757. The reversal of 690733 is 337096.

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

It can be written as a sum of positive squares in 2 ways, for example, as 362404 + 328329 = 602^2 + 573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690733 is a prime.

It is a super-2 number, since 2×690733² = 954224154578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690793) 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, 3060 + ... + 3277.

It is an arithmetic number, because the mean of its divisors is an integer number (174295).

2⁶⁹⁰⁷³³ is an apocalyptic number.

It is an amenable number.

690733 is a deficient number, since it is larger than the sum of its proper divisors (6447).

690733 is a wasteful number, since it uses less digits than its factorization.

690733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 690733 is about 831.1034833280. The cubic root of 690733 is about 88.3968389498.

The spelling of 690733 in words is "six hundred ninety thousand, seven hundred thirty-three".