400061633 has 2 divisors, whose sum is σ = 400061634. Its totient is φ = 400061632.

The previous prime is 400061617. The next prime is 400061653. The reversal of 400061633 is 336160004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378224704 + 21836929 = 19448^2 + 4673^2 .

It is a cyclic number.

It is not a de Polignac number, because 400061633 - 2⁴ = 400061617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 400061599 and 400061608.

It is not a weakly prime, because it can be changed into another prime (400061653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200030816 + 200030817.

It is an arithmetic number, because the mean of its divisors is an integer number (200030817).

Almost surely, 2^400061633 is an apocalyptic number.

It is an amenable number.

400061633 is a deficient number, since it is larger than the sum of its proper divisors (1).

400061633 is an equidigital number, since it uses as much as digits as its factorization.

400061633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 400061633 is about 20001.5407656510. The cubic root of 400061633 is about 736.8441407702.

The spelling of 400061633 in words is "four hundred million, sixty-one thousand, six hundred thirty-three".