400597 has 2 divisors, whose sum is σ = 400598. Its totient is φ = 400596.

The previous prime is 400579. The next prime is 400601. The reversal of 400597 is 795004.

Together with previous prime (400579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206116 + 194481 = 454^2 + 441^2 .

It is a cyclic number.

It is not a de Polignac number, because 400597 - 2¹¹ = 398549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200298 + 200299.

It is an arithmetic number, because the mean of its divisors is an integer number (200299).

2⁴⁰⁰⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

400597 is a deficient number, since it is larger than the sum of its proper divisors (1).

400597 is an equidigital number, since it uses as much as digits as its factorization.

400597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 400597 is about 632.9273260020. The cubic root of 400597 is about 73.7172678649.

The spelling of 400597 in words is "four hundred thousand, five hundred ninety-seven".