694921 has 4 divisors (see below), whose sum is σ = 696592. Its totient is φ = 693252.

The previous prime is 694919. The next prime is 694951. The reversal of 694921 is 129496.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 694921 - 2¹ = 694919 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (694901) 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, 346 + ... + 1228.

It is an arithmetic number, because the mean of its divisors is an integer number (174148).

2⁶⁹⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

694921 is a deficient number, since it is larger than the sum of its proper divisors (1671).

694921 is an equidigital number, since it uses as much as digits as its factorization.

694921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

The product of its digits is 3888, while the sum is 31.

The square root of 694921 is about 833.6192176288. The cubic root of 694921 is about 88.5751327671.

The spelling of 694921 in words is "six hundred ninety-four thousand, nine hundred twenty-one".