694189 has 2 divisors, whose sum is σ = 694190. Its totient is φ = 694188.

The previous prime is 694123. The next prime is 694193. The reversal of 694189 is 981496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 218089 = 690^2 + 467^2 .

It is a cyclic number.

It is not a de Polignac number, because 694189 - 2⁷ = 694061 is a prime.

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

694189 is a lucky number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347094 + 347095.

It is an arithmetic number, because the mean of its divisors is an integer number (347095).

2⁶⁹⁴¹⁸⁹ is an apocalyptic number.

It is an amenable number.

694189 is a deficient number, since it is larger than the sum of its proper divisors (1).

694189 is an equidigital number, since it uses as much as digits as its factorization.

694189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 694189 is about 833.1800525697. The cubic root of 694189 is about 88.5440214245.

The spelling of 694189 in words is "six hundred ninety-four thousand, one hundred eighty-nine".