400365629 has 2 divisors, whose sum is σ = 400365630. Its totient is φ = 400365628.

The previous prime is 400365571. The next prime is 400365643. The reversal of 400365629 is 926563004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309830404 + 90535225 = 17602^2 + 9515^2 .

It is a cyclic number.

It is not a de Polignac number, because 400365629 - 2¹⁶ = 400300093 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (400362629) 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, 200182814 + 200182815.

It is an arithmetic number, because the mean of its divisors is an integer number (200182815).

Almost surely, 2^400365629 is an apocalyptic number.

It is an amenable number.

400365629 is a deficient number, since it is larger than the sum of its proper divisors (1).

400365629 is an equidigital number, since it uses as much as digits as its factorization.

400365629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 400365629 is about 20009.1386371328. The cubic root of 400365629 is about 737.0307294857.

The spelling of 400365629 in words is "four hundred million, three hundred sixty-five thousand, six hundred twenty-nine".