400131049 has 2 divisors, whose sum is σ = 400131050. Its totient is φ = 400131048.

The previous prime is 400131041. The next prime is 400131071. The reversal of 400131049 is 940131004.

It is an a-pointer prime, because the next prime (400131071) can be obtained adding 400131049 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271195024 + 128936025 = 16468^2 + 11355^2 .

It is a cyclic number.

It is not a de Polignac number, because 400131049 - 2³ = 400131041 is a prime.

It is not a weakly prime, because it can be changed into another prime (400131041) 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, 200065524 + 200065525.

It is an arithmetic number, because the mean of its divisors is an integer number (200065525).

Almost surely, 2^400131049 is an apocalyptic number.

It is an amenable number.

400131049 is a deficient number, since it is larger than the sum of its proper divisors (1).

400131049 is an equidigital number, since it uses as much as digits as its factorization.

400131049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 400131049 is about 20003.2759567027. The cubic root of 400131049 is about 736.8867557163.

The spelling of 400131049 in words is "four hundred million, one hundred thirty-one thousand, forty-nine".