690754 has 8 divisors (see below), whose sum is σ = 1044108. Its totient is φ = 342720.

The previous prime is 690721. The next prime is 690757. The reversal of 690754 is 457096.

It can be written as a sum of positive squares in 2 ways, for example, as 616225 + 74529 = 785^2 + 273^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987 + ... + 1534.

2⁶⁹⁰⁷⁵⁴ is an apocalyptic number.

690754 is a deficient number, since it is larger than the sum of its proper divisors (353354).

690754 is a wasteful number, since it uses less digits than its factorization.

690754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 690754 is about 831.1161170378. The cubic root of 690754 is about 88.3977347686.

It can be divided in two parts, 690 and 754, that added together give a square (1444 = 38²).

The spelling of 690754 in words is "six hundred ninety thousand, seven hundred fifty-four".