400341649 has 2 divisors, whose sum is σ = 400341650. Its totient is φ = 400341648.

The previous prime is 400341593. The next prime is 400341659. The reversal of 400341649 is 946143004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 378886225 + 21455424 = 19465^2 + 4632^2 .

It is a cyclic number.

It is not a de Polignac number, because 400341649 - 2¹³ = 400333457 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400341649.

It is not a weakly prime, because it can be changed into another prime (400341659) 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, 200170824 + 200170825.

It is an arithmetic number, because the mean of its divisors is an integer number (200170825).

Almost surely, 2^400341649 is an apocalyptic number.

It is an amenable number.

400341649 is a deficient number, since it is larger than the sum of its proper divisors (1).

400341649 is an equidigital number, since it uses as much as digits as its factorization.

400341649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 400341649 is about 20008.5394019654. The cubic root of 400341649 is about 737.0160143117.

The spelling of 400341649 in words is "four hundred million, three hundred forty-one thousand, six hundred forty-nine".