400297 has 2 divisors, whose sum is σ = 400298. Its totient is φ = 400296.

The previous prime is 400291. The next prime is 400307. The reversal of 400297 is 792004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281961 + 118336 = 531^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 400297 - 2¹¹ = 398249 is a prime.

It is not a weakly prime, because it can be changed into another prime (400291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200148 + 200149.

It is an arithmetic number, because the mean of its divisors is an integer number (200149).

2⁴⁰⁰²⁹⁷ is an apocalyptic number.

It is an amenable number.

400297 is a deficient number, since it is larger than the sum of its proper divisors (1).

400297 is an equidigital number, since it uses as much as digits as its factorization.

400297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 400297 is about 632.6902875815. The cubic root of 400297 is about 73.6988614172.

The spelling of 400297 in words is "four hundred thousand, two hundred ninety-seven".