694399 has 4 divisors (see below), whose sum is σ = 735264. Its totient is φ = 653536.

The previous prime is 694391. The next prime is 694409. The reversal of 694399 is 993496.

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

It is a cyclic number.

It is not a de Polignac number, because 694399 - 2³ = 694391 is a prime.

It is a Duffinian number.

694399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694391) 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, 20407 + ... + 20440.

It is an arithmetic number, because the mean of its divisors is an integer number (183816).

2⁶⁹⁴³⁹⁹ is an apocalyptic number.

694399 is a deficient number, since it is larger than the sum of its proper divisors (40865).

694399 is a wasteful number, since it uses less digits than its factorization.

694399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40864.

The product of its digits is 52488, while the sum is 40.

The square root of 694399 is about 833.3060662206. The cubic root of 694399 is about 88.5529490459.

The spelling of 694399 in words is "six hundred ninety-four thousand, three hundred ninety-nine".