401697 has 6 divisors (see below), whose sum is σ = 580242. Its totient is φ = 267792.

The previous prime is 401689. The next prime is 401707. The reversal of 401697 is 796104.

It can be written as a sum of positive squares in only one way, i.e., 389376 + 12321 = 624^2 + 111^2 .

It is not a de Polignac number, because 401697 - 2³ = 401689 is a prime.

It is a super-2 number, since 2×401697² = 322720959618, which contains 22 as substring.

401697 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 401697.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 401697.

It is not an unprimeable number, because it can be changed into a prime (401627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22308 + ... + 22325.

It is an arithmetic number, because the mean of its divisors is an integer number (96707).

2⁴⁰¹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

401697 is a deficient number, since it is larger than the sum of its proper divisors (178545).

401697 is a wasteful number, since it uses less digits than its factorization.

401697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44639 (or 44636 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 401697 is about 633.7957084108. The cubic root of 401697 is about 73.7846796585.

The spelling of 401697 in words is "four hundred one thousand, six hundred ninety-seven".