400000049 has 2 divisors, whose sum is σ = 400000050. Its totient is φ = 400000048.

The previous prime is 400000043. The next prime is 400000067. The reversal of 400000049 is 940000004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400000000 + 49 = 20000^2 + 7^2 .

It is a cyclic number.

It is not a de Polignac number, because 400000049 - 2²⁰ = 398951473 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 399999982 and 400000036.

It is not a weakly prime, because it can be changed into another prime (400000043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200000024 + 200000025.

It is an arithmetic number, because the mean of its divisors is an integer number (200000025).

Almost surely, 2^400000049 is an apocalyptic number.

It is an amenable number.

400000049 is a deficient number, since it is larger than the sum of its proper divisors (1).

400000049 is an equidigital number, since it uses as much as digits as its factorization.

400000049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 400000049 is about 20000.0012250000. The cubic root of 400000049 is about 736.8063298143.

It can be divided in two parts, 4000000 and 49, that multiplied together give a square (196000000 = 14000²).

The spelling of 400000049 in words is "four hundred million, forty-nine", and thus it is an aban number.