400497 has 4 divisors (see below), whose sum is σ = 534000. Its totient is φ = 266996.

The previous prime is 400481. The next prime is 400523. The reversal of 400497 is 794004.

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 400497 - 2⁴ = 400481 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (400417) 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, 66747 + ... + 66752.

It is an arithmetic number, because the mean of its divisors is an integer number (133500).

2⁴⁰⁰⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

400497 is a deficient number, since it is larger than the sum of its proper divisors (133503).

400497 is a wasteful number, since it uses less digits than its factorization.

400497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133502.

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

The square root of 400497 is about 632.8483230601. The cubic root of 400497 is about 73.7111334037.

The spelling of 400497 in words is "four hundred thousand, four hundred ninety-seven".