400061653 has 2 divisors, whose sum is σ = 400061654. Its totient is φ = 400061652.

The previous prime is 400061633. The next prime is 400061677. The reversal of 400061653 is 356160004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396089604 + 3972049 = 19902^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 400061653 - 2¹³ = 400053461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400061633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200030826 + 200030827.

It is an arithmetic number, because the mean of its divisors is an integer number (200030827).

Almost surely, 2^400061653 is an apocalyptic number.

It is an amenable number.

400061653 is a deficient number, since it is larger than the sum of its proper divisors (1).

400061653 is an equidigital number, since it uses as much as digits as its factorization.

400061653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 400061653 is about 20001.5412656125. The cubic root of 400061653 is about 736.8441530490.

The spelling of 400061653 in words is "four hundred million, sixty-one thousand, six hundred fifty-three".