400897 has 4 divisors (see below), whose sum is σ = 458176. Its totient is φ = 343620.

The previous prime is 400871. The next prime is 400903. The reversal of 400897 is 798004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400897 - 2¹⁵ = 368129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400837) 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 in 3 ways as a sum of consecutive naturals, for example, 28629 + ... + 28642.

It is an arithmetic number, because the mean of its divisors is an integer number (114544).

2⁴⁰⁰⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

400897 is a deficient number, since it is larger than the sum of its proper divisors (57279).

400897 is an equidigital number, since it uses as much as digits as its factorization.

400897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57278.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 400897 is about 633.1642756821. The cubic root of 400897 is about 73.7356651254.

The spelling of 400897 in words is "four hundred thousand, eight hundred ninety-seven".