694138 has 4 divisors (see below), whose sum is σ = 1041210. Its totient is φ = 347068.

The previous prime is 694123. The next prime is 694189. The reversal of 694138 is 831496.

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

It can be written as a sum of positive squares in only one way, i.e., 405769 + 288369 = 637^2 + 537^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173533 + ... + 173536.

2⁶⁹⁴¹³⁸ is an apocalyptic number.

694138 is a deficient number, since it is larger than the sum of its proper divisors (347072).

694138 is a wasteful number, since it uses less digits than its factorization.

694138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347071.

The product of its digits is 5184, while the sum is 31.

The square root of 694138 is about 833.1494463780. The cubic root of 694138 is about 88.5418530161.

The spelling of 694138 in words is "six hundred ninety-four thousand, one hundred thirty-eight".