400464089 has 2 divisors, whose sum is σ = 400464090. Its totient is φ = 400464088.

The previous prime is 400464079. The next prime is 400464137. The reversal of 400464089 is 980464004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285610000 + 114854089 = 16900^2 + 10717^2 .

It is a cyclic number.

It is not a de Polignac number, because 400464089 - 2²⁴ = 383686873 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (400464079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200232044 + 200232045.

It is an arithmetic number, because the mean of its divisors is an integer number (200232045).

Almost surely, 2^400464089 is an apocalyptic number.

It is an amenable number.

400464089 is a deficient number, since it is larger than the sum of its proper divisors (1).

400464089 is an equidigital number, since it uses as much as digits as its factorization.

400464089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 400464089 is about 20011.5988616602. The cubic root of 400464089 is about 737.0911426784.

The spelling of 400464089 in words is "four hundred million, four hundred sixty-four thousand, eighty-nine".