690461 has 6 divisors (see below), whose sum is σ = 715962. Its totient is φ = 665840.

The previous prime is 690449. The next prime is 690467. The reversal of 690461 is 164096.

It can be written as a sum of positive squares in 3 ways, for example, as 60025 + 630436 = 245^2 + 794^2 .

It is not a de Polignac number, because 690461 - 2⁶ = 690397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690461.

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 690461.

It is not an unprimeable number, because it can be changed into a prime (690467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 431 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (119327).

2⁶⁹⁰⁴⁶¹ is an apocalyptic number.

It is an amenable number.

690461 is a deficient number, since it is larger than the sum of its proper divisors (25501).

690461 is an equidigital number, since it uses as much as digits as its factorization.

690461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 690461 is about 830.9398293499. The cubic root of 690461 is about 88.3852343226.

The spelling of 690461 in words is "six hundred ninety thousand, four hundred sixty-one".