401693 has 4 divisors (see below), whose sum is σ = 425340. Its totient is φ = 378048.

The previous prime is 401689. The next prime is 401707. The reversal of 401693 is 396104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 128164 + 273529 = 358^2 + 523^2 .

It is a cyclic number.

It is not a de Polignac number, because 401693 - 2² = 401689 is a prime.

It is a super-2 number, since 2×401693² = 322714532498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11798 + ... + 11831.

It is an arithmetic number, because the mean of its divisors is an integer number (106335).

2⁴⁰¹⁶⁹³ is an apocalyptic number.

It is an amenable number.

401693 is a deficient number, since it is larger than the sum of its proper divisors (23647).

401693 is a wasteful number, since it uses less digits than its factorization.

401693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 401693 is about 633.7925528120. The cubic root of 401693 is about 73.7844347478.

Adding to 401693 its reverse (396104), we get a palindrome (797797).

The spelling of 401693 in words is "four hundred one thousand, six hundred ninety-three".