393697 has 2 divisors, whose sum is σ = 393698. Its totient is φ = 393696.

The previous prime is 393683. The next prime is 393709. The reversal of 393697 is 796393.

393697 is nontrivially palindromic in base 15.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207936 + 185761 = 456^2 + 431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393697 is a prime.

It is not a weakly prime, because it can be changed into another prime (393637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196848 + 196849.

It is an arithmetic number, because the mean of its divisors is an integer number (196849).

2³⁹³⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

393697 is a deficient number, since it is larger than the sum of its proper divisors (1).

393697 is an equidigital number, since it uses as much as digits as its factorization.

393697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 37.

The square root of 393697 is about 627.4527870685. The cubic root of 393697 is about 73.2915717227.

The spelling of 393697 in words is "three hundred ninety-three thousand, six hundred ninety-seven".