400947 has 4 divisors (see below), whose sum is σ = 534600. Its totient is φ = 267296.

The previous prime is 400943. The next prime is 400949. The reversal of 400947 is 749004.

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

It is a cyclic number.

It is not a de Polignac number, because 400947 - 2² = 400943 is a prime.

It is a D-number.

It is a zygodrome in base 2.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 400947.

It is not an unprimeable number, because it can be changed into a prime (400943) 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, 66822 + ... + 66827.

It is an arithmetic number, because the mean of its divisors is an integer number (133650).

2⁴⁰⁰⁹⁴⁷ is an apocalyptic number.

400947 is a deficient number, since it is larger than the sum of its proper divisors (133653).

400947 is a wasteful number, since it uses less digits than its factorization.

400947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133652.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 400947 is about 633.2037586749. The cubic root of 400947 is about 73.7387304431.

The spelling of 400947 in words is "four hundred thousand, nine hundred forty-seven".