400133009 has 2 divisors, whose sum is σ = 400133010. Its totient is φ = 400133008.

The previous prime is 400132973. The next prime is 400133057. The reversal of 400133009 is 900331004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385140625 + 14992384 = 19625^2 + 3872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400133009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400135009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200066504 + 200066505.

It is an arithmetic number, because the mean of its divisors is an integer number (200066505).

Almost surely, 2^400133009 is an apocalyptic number.

It is an amenable number.

400133009 is a deficient number, since it is larger than the sum of its proper divisors (1).

400133009 is an equidigital number, since it uses as much as digits as its factorization.

400133009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 400133009 is about 20003.3249486179. The cubic root of 400133009 is about 736.8879589018.

The spelling of 400133009 in words is "four hundred million, one hundred thirty-three thousand, nine".