394637 has 2 divisors, whose sum is σ = 394638. Its totient is φ = 394636.

The previous prime is 394633. The next prime is 394643. The reversal of 394637 is 736493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 21316 = 611^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 394637 - 2² = 394633 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197318 + 197319.

It is an arithmetic number, because the mean of its divisors is an integer number (197319).

2³⁹⁴⁶³⁷ is an apocalyptic number.

It is an amenable number.

394637 is a deficient number, since it is larger than the sum of its proper divisors (1).

394637 is an equidigital number, since it uses as much as digits as its factorization.

394637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 32.

The square root of 394637 is about 628.2014008262. The cubic root of 394637 is about 73.3498562402.

The spelling of 394637 in words is "three hundred ninety-four thousand, six hundred thirty-seven".