694405 has 8 divisors (see below), whose sum is σ = 862200. Its totient is φ = 536256.

The previous prime is 694391. The next prime is 694409. The reversal of 694405 is 504496.

694405 = 259² + 260² + ... + 268².

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 690561 = 62^2 + 831^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 694405 - 2⁵ = 694373 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250 + ... + 2539.

It is an arithmetic number, because the mean of its divisors is an integer number (107775).

2⁶⁹⁴⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

694405 is a deficient number, since it is larger than the sum of its proper divisors (167795).

694405 is a wasteful number, since it uses less digits than its factorization.

694405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4823.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 694405 is about 833.3096663306. The cubic root of 694405 is about 88.5532040944.

The spelling of 694405 in words is "six hundred ninety-four thousand, four hundred five".