400969 has 4 divisors (see below), whose sum is σ = 411844. Its totient is φ = 390096.

The previous prime is 400963. The next prime is 400997. The reversal of 400969 is 969004.

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 230400 + 170569 = 480^2 + 413^2 .

It is a cyclic number.

It is not a de Polignac number, because 400969 - 2⁹ = 400457 is a prime.

It is a super-2 number, since 2×400969² = 321552277922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400963) 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, 5382 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (102961).

2⁴⁰⁰⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

400969 is a deficient number, since it is larger than the sum of its proper divisors (10875).

400969 is a wasteful number, since it uses less digits than its factorization.

400969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10874.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 400969 is about 633.2211304118. The cubic root of 400969 is about 73.7400791022.

It can be divided in two parts, 400 and 969, that added together give a square (1369 = 37²).

The spelling of 400969 in words is "four hundred thousand, nine hundred sixty-nine".