400686053 has 2 divisors, whose sum is σ = 400686054. Its totient is φ = 400686052.

The previous prime is 400686037. The next prime is 400686119. The reversal of 400686053 is 350686004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294534244 + 106151809 = 17162^2 + 10303^2 .

It is a cyclic number.

It is not a de Polignac number, because 400686053 - 2⁴ = 400686037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400086053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200343026 + 200343027.

It is an arithmetic number, because the mean of its divisors is an integer number (200343027).

Almost surely, 2^400686053 is an apocalyptic number.

It is an amenable number.

400686053 is a deficient number, since it is larger than the sum of its proper divisors (1).

400686053 is an equidigital number, since it uses as much as digits as its factorization.

400686053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 400686053 is about 20017.1439771012. The cubic root of 400686053 is about 737.2272992734.

The spelling of 400686053 in words is "four hundred million, six hundred eighty-six thousand, fifty-three".