400436149 has 2 divisors, whose sum is σ = 400436150. Its totient is φ = 400436148.

The previous prime is 400436143. The next prime is 400436189. The reversal of 400436149 is 941634004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396408100 + 4028049 = 19910^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 400436149 - 2¹³ = 400427957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400436149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400436143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200218074 + 200218075.

It is an arithmetic number, because the mean of its divisors is an integer number (200218075).

Almost surely, 2^400436149 is an apocalyptic number.

It is an amenable number.

400436149 is a deficient number, since it is larger than the sum of its proper divisors (1).

400436149 is an equidigital number, since it uses as much as digits as its factorization.

400436149 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 400436149 is about 20010.9007543389. The cubic root of 400436149 is about 737.0740002296.

The spelling of 400436149 in words is "four hundred million, four hundred thirty-six thousand, one hundred forty-nine".