694000381 has 2 divisors, whose sum is σ = 694000382. Its totient is φ = 694000380.

The previous prime is 694000369. The next prime is 694000387. The reversal of 694000381 is 183000496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 693848281 + 152100 = 26341^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 694000381 - 2⁷ = 694000253 is a prime.

It is a super-2 number, since 2×694000381² = 963273057656290322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (694000387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347000190 + 347000191.

It is an arithmetic number, because the mean of its divisors is an integer number (347000191).

Almost surely, 2^694000381 is an apocalyptic number.

It is an amenable number.

694000381 is a deficient number, since it is larger than the sum of its proper divisors (1).

694000381 is an equidigital number, since it uses as much as digits as its factorization.

694000381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 694000381 is about 26343.8869759191. The cubic root of 694000381 is about 885.3600122748.

The spelling of 694000381 in words is "six hundred ninety-four million, three hundred eighty-one", and thus it is an aban number.